<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  11.2.0.5 -->
<!--Based on XBRL 2.1-->
<!--Created on: 3/24/2026 12:18:13 AM-->
<!--Modified on: 3/24/2026 12:18:13 AM-->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DocumentDocumentAndEntityInformation" roleURI="http://www.deitaxonomy.com/role/DocumentDocumentAndEntityInformation" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#StatementConsolidatedStatementOfChangesInEquity" roleURI="http://www.deitaxonomy.com/role/StatementConsolidatedStatementOfChangesInEquity" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareBasedPaymentsTables" roleURI="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureRelatedPartyTransactionsTables" roleURI="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureMaterialAccountingPoliciesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureMaterialAccountingPoliciesGoingConcernDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesGoingConcernDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureMaterialAccountingPoliciesPropertyPlantAndEquipmentDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesPropertyPlantAndEquipmentDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureMaterialAccountingPoliciesIntangibleAssetsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesIntangibleAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyFairValueOptionDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyFairValueOptionDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureOtherOperatingLossIncomeRollsRoyceSettlementDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureOtherOperatingLossIncomeRollsRoyceSettlementDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureExpensesByNatureDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureExpensesByNatureDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureIncomeTaxCreditChargeComponentsOfIncomeTaxExpenseBenefitDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureIncomeTaxCreditChargeComponentsOfIncomeTaxExpenseBenefitDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosurePropertyPlantAndEquipmentBalanceDetails" roleURI="http://www.deitaxonomy.com/role/DisclosurePropertyPlantAndEquipmentBalanceDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureRightOfUseAssetsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureRightOfUseAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureIntangibleAssetsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureIntangibleAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureIntangibleAssetsAmortisationDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureIntangibleAssetsAmortisationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureTradeAndOtherReceivablesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureTradeAndOtherReceivablesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareCapitalAndOtherReservesAllottedCalledUpAndFullyPaidSharesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesAllottedCalledUpAndFullyPaidSharesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareCapitalAndOtherReservesOrdinarySharesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesOrdinarySharesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareCapitalAndOtherReservesNatureAndPurposeOfOtherReservesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesNatureAndPurposeOfOtherReservesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureLoansFromRelatedPartiesAdditionalInformationDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureLoansFromRelatedPartiesAdditionalInformationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureLeaseLiabilitiesLeaseLiabilitiesMaturityAnalysisDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureLeaseLiabilitiesLeaseLiabilitiesMaturityAnalysisDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureProvisionsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureProvisionsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureWarrantsWarrantsWereIssuedButNotExercisedDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureWarrantsWarrantsWereIssuedButNotExercisedDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureWarrantsChangeInFairValueDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureWarrantsChangeInFairValueDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureWarrantsWarrantsRecognizedWithinEquityDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureWarrantsWarrantsRecognizedWithinEquityDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureWarrantsAdditionalInformationDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureWarrantsAdditionalInformationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareBasedPaymentsFairValueOfEquityInstrumentsGrantedDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsFairValueOfEquityInstrumentsGrantedDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareBasedPaymentsMovementsInNumberAndWeightedAverageExercisePriceOfShareOptionsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsMovementsInNumberAndWeightedAverageExercisePriceOfShareOptionsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureShareBasedPaymentsShareOptionsDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsShareOptionsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossConvertibleSeniorSecuredNotesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossConvertibleSeniorSecuredNotesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossAdditionalInformationDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossAdditionalInformationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialInstrumentsFinancialAssetsAtAmortizedCostDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialAssetsAtAmortizedCostDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialInstrumentsFinancialLiabilitiesAtAmortizedCostDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialLiabilitiesAtAmortizedCostDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialInstrumentsFinancialLiabilitiesAtFairValueThroughProfitOrLossDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialLiabilitiesAtFairValueThroughProfitOrLossDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialInstrumentsFairValueOfConvertibleSeniorSecuredNotesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFairValueOfConvertibleSeniorSecuredNotesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialInstrumentsAdditionalInformationDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsAdditionalInformationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsCreditRiskAndImpairmentDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsCreditRiskAndImpairmentDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsMaturityAnalysisDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsMaturityAnalysisDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureRelatedPartyTransactionsSummaryOfTransactionsWithOtherRelatedPartiesDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsSummaryOfTransactionsWithOtherRelatedPartiesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureRelatedPartyTransactionsTransactionsWithMudrickCapitalAndStephenFitzpatrickDetails" roleURI="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsTransactionsWithMudrickCapitalAndStephenFitzpatrickDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <link:roleRef roleURI="http://www.deitaxonomy.com/role/DisclosureStandardAndCustomAxisDomainDefaults" xlink:type="simple" xlink:href="evtl-20251231.xsd#DisclosureStandardAndCustomAxisDomainDefaults" />
  <link:arcroleRef arcroleURI="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" />
  <link:definitionLink xlink:type="extended" xlink:role="http://www.deitaxonomy.com/role/DisclosureStandardAndCustomAxisDomainDefaults">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesAxis" xlink:label="ProductsAndServicesAxis" xlink:title="ProductsAndServicesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain" xlink:label="ifrs-full_ProductsAndServicesDomain" xlink:title="ProductsAndServicesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ProductsAndServicesAxis" xlink:to="ifrs-full_ProductsAndServicesDomain" xlink:title="definition: ProductsAndServicesAxis to ProductsAndServicesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="StatementClassOfStockAxis" xlink:title="StatementClassOfStockAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="ClassOfStockDomain" xlink:title="ClassOfStockDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementClassOfStockAxis" xlink:to="ClassOfStockDomain" xlink:title="definition: StatementClassOfStockAxis to ClassOfStockDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="SubsidiarySaleOfStockAxis" xlink:title="SubsidiarySaleOfStockAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="SaleOfStockNameOfTransactionDomain" xlink:title="SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="SubsidiarySaleOfStockAxis" xlink:to="SaleOfStockNameOfTransactionDomain" xlink:title="definition: SubsidiarySaleOfStockAxis to SaleOfStockNameOfTransactionDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="SubsequentEventTypeAxis" xlink:title="SubsequentEventTypeAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="SubsequentEventTypeDomain" xlink:title="SubsequentEventTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="SubsequentEventTypeAxis" xlink:to="SubsequentEventTypeDomain" xlink:title="definition: SubsequentEventTypeAxis to SubsequentEventTypeDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="StatementEquityComponentsAxis" xlink:title="StatementEquityComponentsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="EquityComponentDomain" xlink:title="EquityComponentDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementEquityComponentsAxis" xlink:to="EquityComponentDomain" xlink:title="definition: StatementEquityComponentsAxis to EquityComponentDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="RelatedPartyDomain" xlink:title="RelatedPartyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="RelatedPartyDomain" xlink:title="definition: RelatedPartyTransactionsByRelatedPartyAxis to RelatedPartyDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="RelatedPartyTransactionAxis" xlink:title="RelatedPartyTransactionAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="RelatedPartyTransactionDomain" xlink:title="RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RelatedPartyTransactionAxis" xlink:to="RelatedPartyTransactionDomain" xlink:title="definition: RelatedPartyTransactionAxis to RelatedPartyTransactionDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="ClassOfWarrantOrRightAxis" xlink:title="ClassOfWarrantOrRightAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="ClassOfWarrantOrRightDomain" xlink:title="ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassOfWarrantOrRightAxis" xlink:to="ClassOfWarrantOrRightDomain" xlink:title="definition: ClassOfWarrantOrRightAxis to ClassOfWarrantOrRightDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="TypeOfArrangementAxis" xlink:title="TypeOfArrangementAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="ArrangementsAndNonarrangementTransactionsMember" xlink:title="ArrangementsAndNonarrangementTransactionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="TypeOfArrangementAxis" xlink:to="ArrangementsAndNonarrangementTransactionsMember" xlink:title="definition: TypeOfArrangementAxis to ArrangementsAndNonarrangementTransactionsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="ShortTermDebtTypeAxis" xlink:title="ShortTermDebtTypeAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="ShortTermDebtTypeDomain" xlink:title="ShortTermDebtTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ShortTermDebtTypeAxis" xlink:to="ShortTermDebtTypeDomain" xlink:title="definition: ShortTermDebtTypeAxis to ShortTermDebtTypeDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="IncomeStatementLocationAxis" xlink:title="IncomeStatementLocationAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="IncomeStatementLocationDomain" xlink:title="IncomeStatementLocationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="IncomeStatementLocationAxis" xlink:to="IncomeStatementLocationDomain" xlink:title="definition: IncomeStatementLocationAxis to IncomeStatementLocationDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="BalanceSheetLocationAxis" xlink:title="BalanceSheetLocationAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="BalanceSheetLocationDomain" xlink:title="BalanceSheetLocationDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="BalanceSheetLocationAxis" xlink:to="BalanceSheetLocationDomain" xlink:title="definition: BalanceSheetLocationAxis to BalanceSheetLocationDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="FairValueByFairValueHierarchyLevelAxis" xlink:title="FairValueByFairValueHierarchyLevelAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="FairValueByFairValueHierarchyLevelAxis" xlink:to="FairValueMeasurementsFairValueHierarchyDomain" xlink:title="definition: FairValueByFairValueHierarchyLevelAxis to FairValueMeasurementsFairValueHierarchyDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="FairValueByMeasurementFrequencyAxis" xlink:title="FairValueByMeasurementFrequencyAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="FairValueMeasurementFrequencyDomain" xlink:title="FairValueMeasurementFrequencyDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="FairValueByMeasurementFrequencyAxis" xlink:to="FairValueMeasurementFrequencyDomain" xlink:title="definition: FairValueByMeasurementFrequencyAxis to FairValueMeasurementFrequencyDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementAxis" xlink:label="RestatementAxis" xlink:title="RestatementAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementDomain" xlink:label="RestatementDomain" xlink:title="RestatementDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RestatementAxis" xlink:to="RestatementDomain" xlink:title="definition: RestatementAxis to RestatementDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis" xlink:label="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis" xlink:title="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsForErrorCorrectionDomain" xlink:label="AdjustmentsForErrorCorrectionDomain" xlink:title="AdjustmentsForErrorCorrectionDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis" xlink:to="AdjustmentsForErrorCorrectionDomain" xlink:title="definition: ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis to AdjustmentsForErrorCorrectionDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="MeasurementInputTypeAxis" xlink:title="MeasurementInputTypeAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="MeasurementInputTypeDomain" xlink:title="MeasurementInputTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="MeasurementInputTypeAxis" xlink:to="MeasurementInputTypeDomain" xlink:title="definition: MeasurementInputTypeAxis to MeasurementInputTypeDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="CategoriesOfRelatedPartiesAxis" xlink:title="CategoriesOfRelatedPartiesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:title="EntitysTotalForRelatedPartiesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:title="definition: CategoriesOfRelatedPartiesAxis to EntitysTotalForRelatedPartiesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis" xlink:label="BusinessCombinationsAxis" xlink:title="BusinessCombinationsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain" xlink:label="ifrs-full_BusinessCombinationsDomain" xlink:title="EntitysTotalForBusinessCombinationsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="BusinessCombinationsAxis" xlink:to="ifrs-full_BusinessCombinationsDomain" xlink:title="definition: BusinessCombinationsAxis to EntitysTotalForBusinessCombinationsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="TypesOfSharebasedPaymentArrangementsAxis" xlink:title="TypesOfSharebasedPaymentArrangementsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:title="SharebasedPaymentArrangementsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:title="definition: TypesOfSharebasedPaymentArrangementsAxis to SharebasedPaymentArrangementsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis" xlink:title="LegalEntityAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain" xlink:title="EntityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="LegalEntityAxis" xlink:to="EntityDomain" xlink:title="definition: LegalEntityAxis to EntityDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="CounterpartiesAxis" xlink:title="CounterpartiesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" xlink:title="CounterpartiesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" xlink:title="definition: CounterpartiesAxis to CounterpartiesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="SignificantInvestmentsInSubsidiariesAxis" xlink:title="SignificantInvestmentsInSubsidiariesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesDomain" xlink:title="EntitysTotalForSubsidiariesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesDomain" xlink:title="definition: SignificantInvestmentsInSubsidiariesAxis to EntitysTotalForSubsidiariesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DisposalGroupNameAxis" xlink:label="DisposalGroupNameAxis" xlink:title="DisposalGroupNameAxis" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DisposalGroupNameDomain" xlink:label="DisposalGroupNameDomain" xlink:title="DisposalGroupNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="DisposalGroupNameAxis" xlink:to="DisposalGroupNameDomain" xlink:title="definition: DisposalGroupNameAxis to DisposalGroupNameDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="NonadjustingEventsAfterReportingPeriodAxis" xlink:title="NonadjustingEventsAfterReportingPeriodAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:title="NonadjustingEventsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:title="definition: NonadjustingEventsAfterReportingPeriodAxis to NonadjustingEventsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="BorrowingsByNameAxis" xlink:title="BorrowingsByNameAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" xlink:title="BorrowingsByNameMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" xlink:title="definition: BorrowingsByNameAxis to BorrowingsByNameMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesAxis" xlink:label="ClassesOfOrdinarySharesAxis" xlink:title="ClassesOfOrdinarySharesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesDomain" xlink:label="ifrs-full_ClassesOfOrdinarySharesDomain" xlink:title="OrdinarySharesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfOrdinarySharesAxis" xlink:to="ifrs-full_ClassesOfOrdinarySharesDomain" xlink:title="definition: ClassesOfOrdinarySharesAxis to OrdinarySharesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PlanNamesAxis" xlink:label="PlanNamesAxis" xlink:title="PlanNamesAxis" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AwardPlanNamesDomain" xlink:label="AwardPlanNamesDomain" xlink:title="AwardPlanNamesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="PlanNamesAxis" xlink:to="AwardPlanNamesDomain" xlink:title="definition: PlanNamesAxis to AwardPlanNamesDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:label="ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:title="ClassesOfIntangibleAssetsOtherThanGoodwillAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:title="IntangibleAssetsOtherThanGoodwillMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:title="definition: ClassesOfIntangibleAssetsOtherThanGoodwillAxis to IntangibleAssetsOtherThanGoodwillMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="GeographicalAreasAxis" xlink:title="GeographicalAreasAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="ifrs-full_GeographicalAreasDomain" xlink:title="GeographicalAreasMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasDomain" xlink:title="definition: GeographicalAreasAxis to GeographicalAreasMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ClassesOfPropertyPlantAndEquipmentAxis" xlink:title="ClassesOfPropertyPlantAndEquipmentAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:title="PropertyPlantAndEquipmentMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:title="definition: ClassesOfPropertyPlantAndEquipmentAxis to PropertyPlantAndEquipmentMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:title="CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="CarryingAmountMember" xlink:title="CarryingAmountMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="CarryingAmountMember" xlink:title="definition: CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis to CarryingAmountMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="RangeAxis_3" xlink:title="RangeAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" xlink:title="RangesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="RangeAxis_3" xlink:to="ifrs-full_RangeDomain" xlink:title="definition: RangeAxis to RangesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ClassesOfAssetsAxis" xlink:title="ClassesOfAssetsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain" xlink:label="ifrs-full_ClassesOfAssetsDomain" xlink:title="ClassesOfAssetsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsDomain" xlink:title="definition: ClassesOfAssetsAxis to ClassesOfAssetsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:label="ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:title="ClassesOfIntangibleAssetsAndGoodwillAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillDomain" xlink:label="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillDomain" xlink:title="IntangibleAssetsAndGoodwillMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfIntangibleAssetsAndGoodwillAxis" xlink:to="ifrs-full_ClassesOfIntangibleAssetsAndGoodwillDomain" xlink:title="definition: ClassesOfIntangibleAssetsAndGoodwillAxis to IntangibleAssetsAndGoodwillMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:label="AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:title="AttributionOfExpensesByNatureToTheirFunctionAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:title="LineItemsByFunctionMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:to="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:title="definition: AttributionOfExpensesByNatureToTheirFunctionAxis to LineItemsByFunctionMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="MaturityAxis" xlink:title="MaturityAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="ifrs-full_MaturityDomain" xlink:title="AggregatedTimeBandsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="MaturityAxis" xlink:to="ifrs-full_MaturityDomain" xlink:title="definition: MaturityAxis to AggregatedTimeBandsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ClassesOfProvisionsAxis" xlink:title="ClassesOfProvisionsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain" xlink:label="ifrs-full_ClassesOfOtherProvisionsDomain" xlink:title="OtherProvisionsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfProvisionsAxis" xlink:to="ifrs-full_ClassesOfOtherProvisionsDomain" xlink:title="definition: ClassesOfProvisionsAxis to OtherProvisionsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="CategoriesOfFinancialAssetsAxis" xlink:title="CategoriesOfFinancialAssetsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain" xlink:label="ifrs-full_CategoriesOfFinancialAssetsDomain" xlink:title="FinancialAssetsCategoryMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_CategoriesOfFinancialAssetsDomain" xlink:title="definition: CategoriesOfFinancialAssetsAxis to FinancialAssetsCategoryMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ClassesOfFinancialAssetsAxis" xlink:title="ClassesOfFinancialAssetsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:title="FinancialAssetsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:title="definition: ClassesOfFinancialAssetsAxis to FinancialAssetsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="CategoriesOfFinancialLiabilitiesAxis" xlink:title="CategoriesOfFinancialLiabilitiesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:title="FinancialLiabilitiesCategoryMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:title="definition: CategoriesOfFinancialLiabilitiesAxis to FinancialLiabilitiesCategoryMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ClassesOfFinancialLiabilitiesAxis" xlink:title="ClassesOfFinancialLiabilitiesAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:title="FinancialLiabilitiesMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:title="definition: ClassesOfFinancialLiabilitiesAxis to FinancialLiabilitiesMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="LevelsOfFairValueHierarchyAxis" xlink:title="LevelsOfFairValueHierarchyAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:label="ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:title="AllLevelsOfFairValueHierarchyMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:title="definition: LevelsOfFairValueHierarchyAxis to AllLevelsOfFairValueHierarchyMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="CounterpartyNameAxis" xlink:title="CounterpartyNameAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="RepurchaseAgreementCounterpartyNameDomain" xlink:title="RepurchaseAgreementCounterpartyNameDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CounterpartyNameAxis" xlink:to="RepurchaseAgreementCounterpartyNameDomain" xlink:title="definition: CounterpartyNameAxis to RepurchaseAgreementCounterpartyNameDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="StatementScenarioAxis" xlink:title="StatementScenarioAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="ScenarioUnspecifiedDomain" xlink:title="ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="StatementScenarioAxis" xlink:to="ScenarioUnspecifiedDomain" xlink:title="definition: StatementScenarioAxis to ScenarioUnspecifiedDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ClassesOfFinancialInstrumentsAxis" xlink:title="ClassesOfFinancialInstrumentsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:title="ClassesOfFinancialInstrumentsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:title="definition: ClassesOfFinancialInstrumentsAxis to ClassesOfFinancialInstrumentsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="TypesOfRisksAxis" xlink:title="TypesOfRisksAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="ifrs-full_TypesOfRisksDomain" xlink:title="TypesOfRisksMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksDomain" xlink:title="definition: TypesOfRisksAxis to TypesOfRisksMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis" xlink:label="CurrencyAxis" xlink:title="CurrencyAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain" xlink:label="AllCurrenciesDomain" xlink:title="AllCurrenciesDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="CurrencyAxis" xlink:to="AllCurrenciesDomain" xlink:title="definition: CurrencyAxis to AllCurrenciesDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesAddressTypeAxis" xlink:label="EntityAddressesAddressTypeAxis" xlink:title="EntityAddressesAddressTypeAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain" xlink:label="AddressTypeDomain" xlink:title="AddressTypeDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="EntityAddressesAddressTypeAxis" xlink:to="AddressTypeDomain" xlink:title="definition: EntityAddressesAddressTypeAxis to AddressTypeDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightsAxis" xlink:label="ClassOfWarrantOrRightsAxis" xlink:title="ClassOfWarrantOrRightsAxis" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightsDomain" xlink:label="ClassOfWarrantOrRightsDomain" xlink:title="ClassOfWarrantOrRightsDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ClassOfWarrantOrRightsAxis" xlink:to="ClassOfWarrantOrRightsDomain" xlink:title="definition: ClassOfWarrantOrRightsAxis to ClassOfWarrantOrRightsDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis" xlink:label="TitleOfIndividualAxis" xlink:title="TitleOfIndividualAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="TitleOfIndividualWithRelationshipToEntityDomain" xlink:title="TitleOfIndividualWithRelationshipToEntityDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="TitleOfIndividualAxis" xlink:to="TitleOfIndividualWithRelationshipToEntityDomain" xlink:title="definition: TitleOfIndividualAxis to TitleOfIndividualWithRelationshipToEntityDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ComponentsOfEquityAxis" xlink:title="ComponentsOfEquityAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="ifrs-full_ComponentsOfEquityDomain" xlink:title="EquityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="ComponentsOfEquityAxis" xlink:to="ifrs-full_ComponentsOfEquityDomain" xlink:title="definition: ComponentsOfEquityAxis to EquityMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="IfrsSaleOfStockAxis" xlink:title="IfrsSaleOfStockAxis" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="IfrsSaleOfStockDomain" xlink:title="IfrsSaleOfStockDomain" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="IfrsSaleOfStockAxis" xlink:to="IfrsSaleOfStockDomain" xlink:title="definition: IfrsSaleOfStockAxis to IfrsSaleOfStockDomain" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsAxis" xlink:label="UnobservableInputsAxis" xlink:title="UnobservableInputsAxis" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsDomain" xlink:label="ifrs-full_UnobservableInputsDomain" xlink:title="UnobservableInputsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="UnobservableInputsAxis" xlink:to="ifrs-full_UnobservableInputsDomain" xlink:title="definition: UnobservableInputsAxis to UnobservableInputsMember" use="optional" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis" xlink:label="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_1" xlink:title="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RestatedMember" xlink:label="ifrs-full_RestatedMember_1" xlink:title="ifrs-full_RestatedMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_1" xlink:to="ifrs-full_RestatedMember_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis_1 To ifrs-full_RestatedMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ShareBasedCompensationPaymentUsingMeasurementAxis" xlink:label="evtl_ShareBasedCompensationPaymentUsingMeasurementAxis_1" xlink:title="evtl_ShareBasedCompensationPaymentUsingMeasurementAxis_1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ShareBasedCompensationPaymentUsingMeasurementDomain" xlink:label="evtl_ShareBasedCompensationPaymentUsingMeasurementDomain_1" xlink:title="evtl_ShareBasedCompensationPaymentUsingMeasurementDomain_1" />
    <link:definitionArc xlink:type="arc" xlink:from="evtl_ShareBasedCompensationPaymentUsingMeasurementAxis_1" xlink:to="evtl_ShareBasedCompensationPaymentUsingMeasurementDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:evtl_ShareBasedCompensationPaymentUsingMeasurementAxis_1 To evtl_ShareBasedCompensationPaymentUsingMeasurementDomain_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfFinancialAssetsAxis" xlink:label="ifrs-full_TypesOfFinancialAssetsAxis_1" xlink:title="ifrs-full_TypesOfFinancialAssetsAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfFinancialAssetsDomain" xlink:label="ifrs-full_TypesOfFinancialAssetsDomain_1" xlink:title="ifrs-full_FinancialAssetsTypeMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_TypesOfFinancialAssetsAxis_1" xlink:to="ifrs-full_TypesOfFinancialAssetsDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_TypesOfFinancialAssetsAxis_1 To ifrs-full_FinancialAssetsTypeMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReservesWithinEquityAxis" xlink:label="ifrs-full_ReservesWithinEquityAxis_1" xlink:title="ifrs-full_ReservesWithinEquityAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReservesWithinEquityDomain" xlink:label="ifrs-full_ReservesWithinEquityDomain_1" xlink:title="ifrs-full_OtherReservesMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_ReservesWithinEquityAxis_1" xlink:to="ifrs-full_ReservesWithinEquityDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_ReservesWithinEquityAxis_1 To ifrs-full_OtherReservesMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfContractsAxis" xlink:label="ifrs-full_TypesOfContractsAxis_1" xlink:title="ifrs-full_TypesOfContractsAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfContractsDomain" xlink:label="ifrs-full_TypesOfContractsDomain_1" xlink:title="ifrs-full_TypesOfContractsMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_TypesOfContractsAxis_1" xlink:to="ifrs-full_TypesOfContractsDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_TypesOfContractsAxis_1 To ifrs-full_TypesOfContractsMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis_1" xlink:title="ifrs-full_ClassesOfLiabilitiesAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfLiabilitiesDomain_1" xlink:title="ifrs-full_LiabilitiesMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis_1" xlink:to="ifrs-full_ClassesOfLiabilitiesDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_ClassesOfLiabilitiesAxis_1 To ifrs-full_LiabilitiesMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis" xlink:label="ifrs-full_ClassesOfShareCapitalAxis_1" xlink:title="ifrs-full_ClassesOfShareCapitalAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain" xlink:label="ifrs-full_ClassesOfShareCapitalDomain_1" xlink:title="ifrs-full_ClassesOfShareCapitalMember_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_ClassesOfShareCapitalAxis_1" xlink:to="ifrs-full_ClassesOfShareCapitalDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_ClassesOfShareCapitalAxis_1 To ifrs-full_ClassesOfShareCapitalMember_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis_1" xlink:title="evtl_IfrsClassOfWarrantOrRightAxis_1" />
    <link:loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain_1" xlink:title="evtl_IfrsClassOfWarrantOrRightDomain_1" />
    <link:definitionArc xlink:type="arc" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis_1" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:evtl_IfrsClassOfWarrantOrRightAxis_1 To evtl_IfrsClassOfWarrantOrRightDomain_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:title="ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" xlink:title="ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1" xlink:to="ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_TypesOfAntidilutiveInstrumentsAxis_1 To ifrs-full_TypesOfAntidilutiveInstrumentsDomain_1" order="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AssetsAndLiabilitiesAxis" xlink:label="ifrs-full_AssetsAndLiabilitiesAxis_1" xlink:title="ifrs-full_AssetsAndLiabilitiesAxis_1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AssetsAndLiabilitiesDomain" xlink:label="ifrs-full_AssetsAndLiabilitiesDomain_1" xlink:title="ifrs-full_AssetsAndLiabilitiesDomain_1" />
    <link:definitionArc xlink:type="arc" xlink:from="ifrs-full_AssetsAndLiabilitiesAxis_1" xlink:to="ifrs-full_AssetsAndLiabilitiesDomain_1" use="optional" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:title="definition:ifrs-full_AssetsAndLiabilitiesAxis_1 To ifrs-full_AssetsAndLiabilitiesDomain_1" order="1" />
  </link:definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DocumentDocumentAndEntityInformation" xlink:type="extended" xlink:title="995200090 - Document - Document and Entity Information" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesTable" xlink:label="dei_EntityAddressesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesAddressTypeAxis" xlink:label="dei_EntityAddressesAddressTypeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="dei_EntityAddressesTable" xlink:to="dei_EntityAddressesAddressTypeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain" xlink:label="dei_AddressTypeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="dei_EntityAddressesAddressTypeAxis" xlink:to="dei_AddressTypeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_BusinessContactMember" xlink:label="dei_BusinessContactMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="dei_AddressTypeDomain" xlink:to="dei_BusinessContactMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesAxis" xlink:label="ifrs-full_ClassesOfOrdinarySharesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="dei_EntityAddressesTable" xlink:to="ifrs-full_ClassesOfOrdinarySharesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesDomain" xlink:label="ifrs-full_ClassesOfOrdinarySharesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfOrdinarySharesAxis" xlink:to="ifrs-full_ClassesOfOrdinarySharesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_OrdinaryShareMember" xlink:label="evtl_OrdinaryShareMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfOrdinarySharesDomain" xlink:to="evtl_OrdinaryShareMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesLineItems" xlink:label="dei_EntityAddressesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityAddressesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentType" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentRegistrationStatement" xlink:label="dei_DocumentRegistrationStatement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentRegistrationStatement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport" xlink:label="dei_DocumentAnnualReport" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentAnnualReport" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_CurrentFiscalYearEndDate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentPeriodEndDate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentFiscalYearFocus" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentTransitionReport" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentShellCompanyReport" xlink:label="dei_DocumentShellCompanyReport" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentShellCompanyReport" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityFileNumber" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityRegistrantName" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelName" xlink:label="dei_ContactPersonnelName" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_ContactPersonnelName" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_CityAreaCode" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_LocalPhoneNumber" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelEmailAddress" xlink:label="dei_ContactPersonnelEmailAddress" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_ContactPersonnelEmailAddress" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityAddressAddressLine1" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityAddressCityOrTown" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="19" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityAddressPostalZipCode" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCountry" xlink:label="dei_EntityAddressCountry" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="20" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityAddressCountry" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="21" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_Security12bTitle" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="22" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_TradingSymbol" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="23" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_SecurityExchangeName" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="24" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="25" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityWellKnownSeasonedIssuer" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="26" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityVoluntaryFilers" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="27" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityCurrentReportingStatus" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="28" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityInteractiveDataCurrent" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="29" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityFilerCategory" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="30" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityEmergingGrowthCompany" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="31" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityExTransitionPeriod" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="dei_IcfrAuditorAttestationFlag" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="32" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_IcfrAuditorAttestationFlag" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="33" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentFinStmtErrorCorrectionFlag" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAccountingStandard" xlink:label="dei_DocumentAccountingStandard" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="34" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentAccountingStandard" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="35" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityShellCompany" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="dei_AuditorFirmId" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="36" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_AuditorFirmId" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="dei_AuditorName" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="37" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_AuditorName" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="dei_AuditorLocation" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="38" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_AuditorLocation" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="39" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_EntityCentralIndexKey" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="40" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_AmendmentFlag" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="41" xlink:from="dei_EntityAddressesLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/StatementConsolidatedStatementOfChangesInEquity" xlink:type="extended" xlink:title="995200400 - Statement - Consolidated Statement of Changes in Equity" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="ifrs-full_StatementOfChangesInEquityTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_StatementOfChangesInEquityTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="ifrs-full_ComponentsOfEquityDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_ComponentsOfEquityDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_IssuedCapitalMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremiumMember" xlink:label="ifrs-full_SharePremiumMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_SharePremiumMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasurySharesMember" xlink:label="ifrs-full_TreasurySharesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_TreasurySharesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherReservesMember" xlink:label="ifrs-full_OtherReservesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_OtherReservesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarningsMember" xlink:label="ifrs-full_RetainedEarningsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_RetainedEarningsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_StatementOfChangesInEquityTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_Equity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_ProfitLoss" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_ComprehensiveIncome" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:label="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IssueOfEquityToOtherThanRelatedParties" xlink:label="evtl_IssueOfEquityToOtherThanRelatedParties" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="evtl_IssueOfEquityToOtherThanRelatedParties" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseThroughIssueOfWarrantsToPartiesOtherThanRelatedPartiesEquity" xlink:label="evtl_IncreaseThroughIssueOfWarrantsToPartiesOtherThanRelatedPartiesEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="evtl_IncreaseThroughIssueOfWarrantsToPartiesOtherThanRelatedPartiesEquity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IssueOfEquityToRelatedParty" xlink:label="evtl_IssueOfEquityToRelatedParty" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="evtl_IssueOfEquityToRelatedParty" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseThroughIssuanceOfWarrantsToRelatedPartiesEquity" xlink:label="evtl_IncreaseDecreaseThroughIssuanceOfWarrantsToRelatedPartiesEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="evtl_IncreaseDecreaseThroughIssuanceOfWarrantsToRelatedPartiesEquity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PurchaseOfTreasuryShares" xlink:label="ifrs-full_PurchaseOfTreasuryShares" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_PurchaseOfTreasuryShares" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseThroughTransferOfOtherReserveEquity" xlink:label="evtl_IncreaseDecreaseThroughTransferOfOtherReserveEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="evtl_IncreaseDecreaseThroughTransferOfOtherReserveEquity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments" xlink:label="ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShareIssueRelatedCost" xlink:label="ifrs-full_ShareIssueRelatedCost" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_ShareIssueRelatedCost" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughExerciseOfOptions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsTables" xlink:type="extended" xlink:title="99932303 - Disclosure - Share-based payments (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EnterpriseManagementIncentiveSchemeEmiMember" xlink:label="evtl_EnterpriseManagementIncentiveSchemeEmiMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_EnterpriseManagementIncentiveSchemeEmiMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:label="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ScheduleOfExpenseFromShareBasedPaymentTransactionsTableTextBlock" xlink:label="evtl_ScheduleOfExpenseFromShareBasedPaymentTransactionsTableTextBlock" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ScheduleOfExpenseFromShareBasedPaymentTransactionsTableTextBlock" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" xlink:label="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" xlink:label="ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsTables" xlink:type="extended" xlink:title="99932703 - Disclosure - Related party transactions (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" xlink:label="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="ifrs-full_KeyManagementPersonnelOfEntityOrParentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" xlink:label="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_DisclosureOfInformationAboutKeyManagementPersonnelExplanatory" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DisclosureOfBoardMembersTableTextBlock" xlink:label="evtl_DisclosureOfBoardMembersTableTextBlock" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_DisclosureOfBoardMembersTableTextBlock" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesDetails" xlink:type="extended" xlink:title="99940201 - Disclosure - Material accounting policies (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="ifrs-full_StatementOfChangesInEquityTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_StatementOfChangesInEquityTable" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain" xlink:label="ifrs-full_SignificantInvestmentsInSubsidiariesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="ifrs-full_SignificantInvestmentsInSubsidiariesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_VerticalAerospaceGroupLtdMember" xlink:label="evtl_VerticalAerospaceGroupLtdMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_SignificantInvestmentsInSubsidiariesDomain" xlink:to="evtl_VerticalAerospaceGroupLtdMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems" xlink:label="ifrs-full_StatementOfChangesInEquityLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_StatementOfChangesInEquityTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesGoingConcernDetails" xlink:type="extended" xlink:title="99940202 - Disclosure - Material accounting policies - Going concern (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJanuary2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJanuary2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJanuary2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJuly2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJuly2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJuly2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AtMarketOfferingMember" xlink:label="evtl_AtMarketOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_AtMarketOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_BorrowingsByNameAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_BorrowingsByNameDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_LiquidityPositionAtDateOfSigningOfReportMember" xlink:label="evtl_LiquidityPositionAtDateOfSigningOfReportMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:to="evtl_LiquidityPositionAtDateOfSigningOfReportMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:label="ifrs-full_MajorOrdinaryShareTransactionsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:to="ifrs-full_MajorOrdinaryShareTransactionsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" xlink:to="srt_StatementScenarioAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioForecastMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:label="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary" xlink:label="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_ProportionOfOwnershipInterestInSubsidiary" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_CashAndCashEquivalents" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ExpectedNetCashOutflowsFromOperationsOverNextTwelveMonthPeriod" xlink:label="evtl_ExpectedNetCashOutflowsFromOperationsOverNextTwelveMonthPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="evtl_ExpectedNetCashOutflowsFromOperationsOverNextTwelveMonthPeriod" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CommonStockCapitalReservedForFutureIssuance" xlink:label="evtl_CommonStockCapitalReservedForFutureIssuance" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="evtl_CommonStockCapitalReservedForFutureIssuance" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" xlink:label="evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_ProceedsFromIssuingShares" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ProceedsFromIssuanceOfUnits" xlink:label="evtl_ProceedsFromIssuanceOfUnits" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="evtl_ProceedsFromIssuanceOfUnits" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="ifrs-full_Equity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MandatoryCashBalanceUnderLoanCovenants" xlink:label="evtl_MandatoryCashBalanceUnderLoanCovenants" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems" xlink:to="evtl_MandatoryCashBalanceUnderLoanCovenants" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="extended" xlink:title="99940204 - Disclosure - Material accounting policies - Property, plant and equipment (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OfficeEquipmentMember" xlink:label="ifrs-full_OfficeEquipmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_OfficeEquipmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PropertyAndEquipmentMember" xlink:label="evtl_PropertyAndEquipmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="evtl_PropertyAndEquipmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_VehiclesMember" xlink:label="ifrs-full_VehiclesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_VehiclesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureMaterialAccountingPoliciesIntangibleAssetsDetails" xlink:type="extended" xlink:title="99940205 - Disclosure - Material accounting policies - Intangible assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember" xlink:label="ifrs-full_ComputerSoftwareMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:to="ifrs-full_ComputerSoftwareMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyDetails" xlink:type="extended" xlink:title="99940301 - Disclosure - Critical accounting judgments and key sources of estimation uncertainty (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_RangeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_TopOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJanuary2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJanuary2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJanuary2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="srt_StatementScenarioAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FirstHalfOfPrincipalAmountMember" xlink:label="evtl_FirstHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_FirstHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RemainingHalfOfPrincipalAmountMember" xlink:label="evtl_RemainingHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_RemainingHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_BorrowingsByNameAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_BorrowingsByNameDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="6" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_CounterpartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CounterpartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" xlink:label="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" xlink:label="evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ProceedsFromIssuanceOfUnits" xlink:label="evtl_ProceedsFromIssuanceOfUnits" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ProceedsFromIssuanceOfUnits" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightNumberOfDaysOfVolumeWeightedAveragePriceUsedForDeterminingExpiryTerm" xlink:label="evtl_ClassOfWarrantOrRightNumberOfDaysOfVolumeWeightedAveragePriceUsedForDeterminingExpiryTerm" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ClassOfWarrantOrRightNumberOfDaysOfVolumeWeightedAveragePriceUsedForDeterminingExpiryTerm" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightThresholdPercentageOfExercisePriceUsedForDeterminingExpiryTerm" xlink:label="evtl_ClassOfWarrantOrRightThresholdPercentageOfExercisePriceUsedForDeterminingExpiryTerm" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ClassOfWarrantOrRightThresholdPercentageOfExercisePriceUsedForDeterminingExpiryTerm" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsExpirationPeriod" xlink:label="evtl_WarrantsExpirationPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_WarrantsExpirationPeriod" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MeasurementTermOfSharePriceAfterPublicDisclosureOfSuccessfulWingBorneFlightToDetermineWarrantsExpiration" xlink:label="evtl_MeasurementTermOfSharePriceAfterPublicDisclosureOfSuccessfulWingBorneFlightToDetermineWarrantsExpiration" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_MeasurementTermOfSharePriceAfterPublicDisclosureOfSuccessfulWingBorneFlightToDetermineWarrantsExpiration" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" xlink:label="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerWarrant" xlink:label="evtl_MarketValuePerWarrant" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_MarketValuePerWarrant" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSharePrice" xlink:label="evtl_IfrsSharePrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_IfrsSharePrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_BorrowingsCashInterestRate" xlink:label="evtl_BorrowingsCashInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_BorrowingsCashInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_BorrowingsPaidInKindInterestRate" xlink:label="evtl_BorrowingsPaidInKindInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_BorrowingsPaidInKindInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtInstrumentConvertibleConversionPrice" xlink:label="evtl_IfrsDebtInstrumentConvertibleConversionPrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_IfrsDebtInstrumentConvertibleConversionPrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" xlink:label="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" xlink:label="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionOriginalDebtAmount" xlink:label="evtl_IfrsDebtConversionOriginalDebtAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_IfrsDebtConversionOriginalDebtAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" xlink:label="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerShare" xlink:label="evtl_MarketValuePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="19" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_MarketValuePerShare" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureCriticalAccountingJudgmentsAndKeySourcesOfEstimationUncertaintyFairValueOptionDetails" xlink:type="extended" xlink:title="99940302 - Disclosure - Critical accounting judgments and key sources of estimation uncertainty - Fair value option (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfEquityTable" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfEquityTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfEquityTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasurementInputSpotRate" xlink:label="evtl_WarrantsMeasurementInputSpotRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="evtl_WarrantsMeasurementInputSpotRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasurementInputStrikeRate" xlink:label="evtl_WarrantsMeasurementInputStrikeRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="evtl_WarrantsMeasurementInputStrikeRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasurementInputRiskFreeInterestRate" xlink:label="evtl_WarrantsMeasurementInputRiskFreeInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="evtl_WarrantsMeasurementInputRiskFreeInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasurementInputTerm" xlink:label="evtl_WarrantsMeasurementInputTerm" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="evtl_WarrantsMeasurementInputTerm" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasurementInputVolatility" xlink:label="evtl_WarrantsMeasurementInputVolatility" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfEquityLineItems" xlink:to="evtl_WarrantsMeasurementInputVolatility" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureOtherOperatingLossIncomeRollsRoyceSettlementDetails" xlink:type="extended" xlink:title="99940502 - Disclosure - Other operating (loss)/income - Rolls-Royce settlement (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:label="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfContractsAxis" xlink:label="ifrs-full_TypesOfContractsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="ifrs-full_TypesOfContractsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfContractsDomain" xlink:label="ifrs-full_TypesOfContractsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfContractsAxis" xlink:to="ifrs-full_TypesOfContractsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DesignContractWithRollsRoyceMember" xlink:label="evtl_DesignContractWithRollsRoyceMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfContractsDomain" xlink:to="evtl_DesignContractWithRollsRoyceMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:label="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ContractTerminationAmountOfPaymentReceived" xlink:label="evtl_ContractTerminationAmountOfPaymentReceived" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="evtl_ContractTerminationAmountOfPaymentReceived" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ContractTerminationTreasuryStockSharesAcquired" xlink:label="evtl_ContractTerminationTreasuryStockSharesAcquired" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="evtl_ContractTerminationTreasuryStockSharesAcquired" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PurchaseOfTreasuryShares" xlink:label="ifrs-full_PurchaseOfTreasuryShares" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:to="ifrs-full_PurchaseOfTreasuryShares" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureExpensesByNatureDetails" xlink:type="extended" xlink:title="99940701 - Disclosure - Expenses by nature (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable" xlink:to="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:to="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ResearchAndDevelopmentAndAdministrativeExpensesMember" xlink:label="evtl_ResearchAndDevelopmentAndAdministrativeExpensesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:to="evtl_ResearchAndDevelopmentAndAdministrativeExpensesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ResearchAndDevelopmentExpensesMember" xlink:label="evtl_ResearchAndDevelopmentExpensesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_ResearchAndDevelopmentAndAdministrativeExpensesMember" xlink:to="evtl_ResearchAndDevelopmentExpensesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AdministrativeExpensesMember" xlink:label="evtl_AdministrativeExpensesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_ResearchAndDevelopmentAndAdministrativeExpensesMember" xlink:to="evtl_AdministrativeExpensesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:label="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EmployeeBenefitsExpenseExcludingShareBasedPaymentExpenses" xlink:label="evtl_EmployeeBenefitsExpenseExcludingShareBasedPaymentExpenses" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_EmployeeBenefitsExpenseExcludingShareBasedPaymentExpenses" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConsultancyCosts" xlink:label="evtl_ConsultancyCosts" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_ConsultancyCosts" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ExpenseOfComponentsPartsAndTooling" xlink:label="evtl_ExpenseOfComponentsPartsAndTooling" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_ExpenseOfComponentsPartsAndTooling" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseByNature" xlink:label="ifrs-full_ExpenseByNature" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_ExpenseByNature" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_LegalAndFinancialAdvisoryCosts" xlink:label="evtl_LegalAndFinancialAdvisoryCosts" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_LegalAndFinancialAdvisoryCosts" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_HrAdvisoryAndRecruitmentCosts" xlink:label="evtl_HrAdvisoryAndRecruitmentCosts" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_HrAdvisoryAndRecruitmentCosts" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ItHardwareAndSoftwareCosts" xlink:label="evtl_ItHardwareAndSoftwareCosts" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_ItHardwareAndSoftwareCosts" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InsuranceExpense" xlink:label="ifrs-full_InsuranceExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_InsuranceExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SalesAndMarketingExpense" xlink:label="ifrs-full_SalesAndMarketingExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_SalesAndMarketingExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PremisesExpenses" xlink:label="evtl_PremisesExpenses" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_PremisesExpenses" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TravelExpense" xlink:label="ifrs-full_TravelExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_TravelExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AviationAndAerospaceRegulatoryFees" xlink:label="evtl_AviationAndAerospaceRegulatoryFees" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_AviationAndAerospaceRegulatoryFees" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationExpense" xlink:label="ifrs-full_DepreciationExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_DepreciationExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationExpense" xlink:label="ifrs-full_AmortisationExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_AmortisationExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRightofuseAssets" xlink:label="ifrs-full_DepreciationRightofuseAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="ifrs-full_DepreciationRightofuseAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_OtherAdministrativeExpense" xlink:label="evtl_OtherAdministrativeExpense" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_OtherAdministrativeExpense" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AdministrativeExpenseRelatedPartyTransactions" xlink:label="evtl_AdministrativeExpenseRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="19" xlink:from="ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems" xlink:to="evtl_AdministrativeExpenseRelatedPartyTransactions" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureIncomeTaxCreditChargeComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="extended" xlink:title="99941001 - Disclosure - Income tax credit/(charge) - Components of income tax expense (benefit) (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis" xlink:label="ifrs-full_GeographicalAreasAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" xlink:to="ifrs-full_GeographicalAreasAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasDomain" xlink:label="ifrs-full_GeographicalAreasDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_GeographicalAreasAxis" xlink:to="ifrs-full_GeographicalAreasDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB" xlink:label="country_GB" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_GeographicalAreasDomain" xlink:to="country_GB" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:label="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:to="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxExpenseIncome" xlink:label="ifrs-full_CurrentTaxExpenseIncome" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:to="ifrs-full_CurrentTaxExpenseIncome" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ApplicableTaxRate" xlink:label="ifrs-full_ApplicableTaxRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems" xlink:to="ifrs-full_ApplicableTaxRate" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosurePropertyPlantAndEquipmentBalanceDetails" xlink:type="extended" xlink:title="99941101 - Disclosure - Property, plant and equipment - Balance (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:label="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PropertyAndEquipmentMember" xlink:label="evtl_PropertyAndEquipmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="evtl_PropertyAndEquipmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseholdImprovementsMember" xlink:label="ifrs-full_LeaseholdImprovementsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_LeaseholdImprovementsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConstructionInProgressMember" xlink:label="ifrs-full_ConstructionInProgressMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_ConstructionInProgressMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OfficeEquipmentMember" xlink:label="ifrs-full_OfficeEquipmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_OfficeEquipmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MotorVehiclesMember" xlink:label="ifrs-full_MotorVehiclesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain" xlink:to="ifrs-full_MotorVehiclesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:label="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:label="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems" xlink:to="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="ifrs-full_PropertyPlantAndEquipment" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment" xlink:label="ifrs-full_DepreciationPropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="ifrs-full_DepreciationPropertyPlantAndEquipment" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:label="ifrs-full_DisposalsPropertyPlantAndEquipment" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract" xlink:to="ifrs-full_DisposalsPropertyPlantAndEquipment" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureRightOfUseAssetsDetails" xlink:type="extended" xlink:title="99941201 - Disclosure - Right of use assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsAxis" xlink:label="ifrs-full_ClassesOfAssetsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:to="ifrs-full_ClassesOfAssetsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfAssetsDomain" xlink:label="ifrs-full_ClassesOfAssetsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfAssetsAxis" xlink:to="ifrs-full_ClassesOfAssetsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentMember" xlink:label="ifrs-full_PropertyPlantAndEquipmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfAssetsDomain" xlink:to="ifrs-full_PropertyPlantAndEquipmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" xlink:label="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:label="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_RightofuseAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsRightofuseAssets" xlink:label="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsRightofuseAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_AdditionsOtherThanThroughBusinessCombinationsRightofuseAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsRightofuseAssets" xlink:label="ifrs-full_DisposalsRightofuseAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_DisposalsRightofuseAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRightofuseAssets" xlink:label="ifrs-full_DepreciationRightofuseAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems" xlink:to="ifrs-full_DepreciationRightofuseAssets" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureIntangibleAssetsDetails" xlink:type="extended" xlink:title="99941301 - Disclosure - Intangible assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember" xlink:label="ifrs-full_GrossCarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_GrossCarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:label="ifrs-full_AccumulatedDepreciationAndAmortisationMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedDepreciationAndAmortisationMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:label="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember" xlink:label="ifrs-full_ComputerSoftwareMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain" xlink:to="ifrs-full_ComputerSoftwareMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" xlink:label="ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwill" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" xlink:to="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract" xlink:to="ifrs-full_DisposalsIntangibleAssetsOtherThanGoodwill" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureIntangibleAssetsAmortisationDetails" xlink:type="extended" xlink:title="99941302 - Disclosure - Intangible assets - Amortisation (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:label="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis" xlink:to="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AdministrativeExpensesMember" xlink:label="evtl_AdministrativeExpensesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain" xlink:to="evtl_AdministrativeExpensesMember" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:label="ifrs-full_DisclosureOfIntangibleAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_DisclosureOfIntangibleAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureTradeAndOtherReceivablesDetails" xlink:type="extended" xlink:title="99941501 - Disclosure - Trade and other receivables (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOffsettingOfFinancialAssetsTable" xlink:label="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_ClassesOfFinancialAssetsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_HmRevenueAndCustomsResearchAndDevelopmentExpenditureCreditMember" xlink:label="evtl_HmRevenueAndCustomsResearchAndDevelopmentExpenditureCreditMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="evtl_HmRevenueAndCustomsResearchAndDevelopmentExpenditureCreditMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_HmRevenueAndCustomsEnhancedResearchAndDevelopmentIntensiveSupportAndPredecessorSchemesMember" xlink:label="evtl_HmRevenueAndCustomsEnhancedResearchAndDevelopmentIntensiveSupportAndPredecessorSchemesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="evtl_HmRevenueAndCustomsEnhancedResearchAndDevelopmentIntensiveSupportAndPredecessorSchemesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:label="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CurrentResearchAndDevelopmentTaxCreditReceivables" xlink:label="evtl_CurrentResearchAndDevelopmentTaxCreditReceivables" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="evtl_CurrentResearchAndDevelopmentTaxCreditReceivables" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_GovernmentGrantsAndValueAddedTaxReceivable" xlink:label="evtl_GovernmentGrantsAndValueAddedTaxReceivable" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="evtl_GovernmentGrantsAndValueAddedTaxReceivable" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentPrepayments" xlink:label="ifrs-full_CurrentPrepayments" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="ifrs-full_CurrentPrepayments" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentReceivables" xlink:label="ifrs-full_OtherCurrentReceivables" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="ifrs-full_OtherCurrentReceivables" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:label="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="ifrs-full_TradeAndOtherCurrentReceivables" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfOffsettingOfFinancialAssetsLineItems" xlink:to="ifrs-full_TradeAndOtherCurrentReceivables" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesAllottedCalledUpAndFullyPaidSharesDetails" xlink:type="extended" xlink:title="99941601 - Disclosure - Share capital and other reserves - Allotted, called up and fully paid shares (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesAxis" xlink:label="ifrs-full_ClassesOfOrdinarySharesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_ClassesOfOrdinarySharesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOrdinarySharesDomain" xlink:label="ifrs-full_ClassesOfOrdinarySharesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfOrdinarySharesAxis" xlink:to="ifrs-full_ClassesOfOrdinarySharesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_OrdinaryShareMember" xlink:label="evtl_OrdinaryShareMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfOrdinarySharesDomain" xlink:to="evtl_OrdinaryShareMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AtMarketOfferingMember" xlink:label="evtl_AtMarketOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_AtMarketOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_RangeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageMember" xlink:label="ifrs-full_WeightedAverageMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_WeightedAverageMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DisclosureOfClassesOfShareCapitalTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssuedAndFullyPaid" xlink:label="ifrs-full_NumberOfSharesIssuedAndFullyPaid" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesIssuedAndFullyPaid" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital" xlink:label="ifrs-full_IssuedCapital" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_IssuedCapital" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParValuePerShare" xlink:label="ifrs-full_ParValuePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_ParValuePerShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:label="ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesAuthorised" xlink:label="ifrs-full_NumberOfSharesAuthorised" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_NumberOfSharesAuthorised" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" xlink:label="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CommonStockCapitalReservedForFutureIssuance" xlink:label="evtl_CommonStockCapitalReservedForFutureIssuance" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="evtl_CommonStockCapitalReservedForFutureIssuance" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" xlink:label="evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="evtl_SaleOfStockPercentageOfCommissionOnGrossProceeds" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSharesIssuedPricePerShare" xlink:label="evtl_IfrsSharesIssuedPricePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="evtl_IfrsSharesIssuedPricePerShare" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesOrdinarySharesDetails" xlink:type="extended" xlink:title="99941602 - Disclosure - Share capital and other reserves - Ordinary shares (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJanuary2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJanuary2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJanuary2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJuly2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJuly2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJuly2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AtMarketOfferingMember" xlink:label="evtl_AtMarketOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_AtMarketOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:label="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EnterpriseManagementIncentiveSchemeEmiMember" xlink:label="evtl_EnterpriseManagementIncentiveSchemeEmiMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_EnterpriseManagementIncentiveSchemeEmiMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain" xlink:label="ifrs-full_ComponentsOfEquityDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_ComponentsOfEquityDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_IssuedCapitalMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremiumMember" xlink:label="ifrs-full_SharePremiumMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ComponentsOfEquityDomain" xlink:to="ifrs-full_SharePremiumMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:label="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_DisclosureOfClassesOfShareCapitalTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" xlink:label="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_ProceedsFromIssuingShares" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfClassesOfShareCapitalLineItems" xlink:to="ifrs-full_IssueOfEquity" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareCapitalAndOtherReservesNatureAndPurposeOfOtherReservesDetails" xlink:type="extended" xlink:title="99941603 - Disclosure - Share capital and other reserves - Nature and purpose of other reserves (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfReservesWithinEquityTable" xlink:label="ifrs-full_DisclosureOfReservesWithinEquityTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJanuary2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJanuary2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJanuary2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:label="ifrs-full_DisclosureOfReservesWithinEquityLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_DisclosureOfReservesWithinEquityTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfSharebasedPayments" xlink:label="ifrs-full_ReserveOfSharebasedPayments" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_ReserveOfSharebasedPayments" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_ReserveOfExchangeDifferencesOnTranslation" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WarrantReserve" xlink:label="ifrs-full_WarrantReserve" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_WarrantReserve" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MergerReserve" xlink:label="ifrs-full_MergerReserve" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_MergerReserve" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherReserves" xlink:label="ifrs-full_OtherReserves" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="ifrs-full_OtherReserves" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" xlink:label="evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="evtl_ClassOfWarrantOrRightsNumberOfWarrantsIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseThroughIssuanceOfWarrantsEquity" xlink:label="evtl_IncreaseDecreaseThroughIssuanceOfWarrantsEquity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfReservesWithinEquityLineItems" xlink:to="evtl_IncreaseDecreaseThroughIssuanceOfWarrantsEquity" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureLoansFromRelatedPartiesAdditionalInformationDetails" xlink:type="extended" xlink:title="99941702 - Disclosure - Loans from related parties - Additional Information (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="srt_StatementScenarioAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInCashMember" xlink:label="evtl_InterestPaidInCashMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInCashMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" xlink:label="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FirstHalfOfPrincipalAmountMember" xlink:label="evtl_FirstHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_FirstHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RemainingHalfOfPrincipalAmountMember" xlink:label="evtl_RemainingHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_RemainingHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_CounterpartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CounterpartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" use="optional" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:label="ifrs-full_LevelsOfFairValueHierarchyDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_LevelsOfFairValueHierarchyDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="6" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" use="optional" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_BorrowingsByNameDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="ifrs-full_NotionalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_NotionalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtInstrumentConvertibleConversionPrice" xlink:label="evtl_IfrsDebtInstrumentConvertibleConversionPrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtInstrumentConvertibleConversionPrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" xlink:label="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" xlink:label="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionOriginalDebtAmount" xlink:label="evtl_IfrsDebtConversionOriginalDebtAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtConversionOriginalDebtAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" xlink:label="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerShare" xlink:label="evtl_MarketValuePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_MarketValuePerShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSharePrice" xlink:label="evtl_IfrsSharePrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsSharePrice" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureLeaseLiabilitiesLeaseLiabilitiesMaturityAnalysisDetails" xlink:type="extended" xlink:title="99941802 - Disclosure - Lease liabilities - Lease liabilities maturity analysis (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" xlink:to="ifrs-full_MaturityAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="ifrs-full_MaturityDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_MaturityDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_NotLaterThanOneYearMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_LaterThanFiveYearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:label="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:to="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossLeaseLiabilities" xlink:label="ifrs-full_GrossLeaseLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:to="ifrs-full_GrossLeaseLiabilities" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureProvisionsDetails" xlink:type="extended" xlink:title="99941901 - Disclosure - Provisions (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable" xlink:label="ifrs-full_DisclosureOfOtherProvisionsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis" xlink:label="ifrs-full_ClassesOfProvisionsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfOtherProvisionsTable" xlink:to="ifrs-full_ClassesOfProvisionsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain" xlink:label="ifrs-full_ClassesOfOtherProvisionsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfProvisionsAxis" xlink:to="ifrs-full_ClassesOfOtherProvisionsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TaxAndSocialSecurityMember" xlink:label="evtl_TaxAndSocialSecurityMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfOtherProvisionsDomain" xlink:to="evtl_TaxAndSocialSecurityMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DilapidationProvisionMember" xlink:label="evtl_DilapidationProvisionMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfOtherProvisionsDomain" xlink:to="evtl_DilapidationProvisionMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:label="ifrs-full_DisclosureOfOtherProvisionsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_DisclosureOfOtherProvisionsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherProvisions" xlink:label="ifrs-full_OtherProvisions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_OtherProvisions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionalProvisionsOtherProvisions" xlink:label="ifrs-full_AdditionalProvisionsOtherProvisions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_AdditionalProvisionsOtherProvisions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions" xlink:label="ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfOtherProvisionsLineItems" xlink:to="ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureWarrantsWarrantsWereIssuedButNotExercisedDetails" xlink:type="extended" xlink:title="99942101 - Disclosure - Warrants - Warrants were issued but not exercised (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" xlink:label="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PublicWarrantsMember" xlink:label="evtl_PublicWarrantsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" xlink:to="evtl_PublicWarrantsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleNotesWarrantsMember" xlink:label="evtl_ConvertibleNotesWarrantsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" xlink:to="evtl_ConvertibleNotesWarrantsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightOutstanding" xlink:label="evtl_IfrsClassOfWarrantOrRightOutstanding" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_IfrsClassOfWarrantOrRightOutstanding" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureWarrantsChangeInFairValueDetails" xlink:type="extended" xlink:title="99942102 - Disclosure - Warrants - Change in fair value (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:to="ifrs-full_ClassesOfLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantLiabilitiesMember" xlink:label="evtl_WarrantLiabilitiesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfLiabilitiesDomain" xlink:to="evtl_WarrantLiabilitiesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentWarrantLiability" xlink:label="ifrs-full_CurrentWarrantLiability" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_CurrentWarrantLiability" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" xlink:label="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" xlink:label="ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureWarrantsWarrantsRecognizedWithinEquityDetails" xlink:type="extended" xlink:title="99942103 - Disclosure - Warrants - Warrants recognized within equity (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsRecognizedWithinEquityMember" xlink:label="evtl_WarrantsRecognizedWithinEquityMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_WarrantsRecognizedWithinEquityMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:label="evtl_WarrantsFromUnderwrittenPublicOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_WarrantsRecognizedWithinEquityMember" xlink:to="evtl_WarrantsFromUnderwrittenPublicOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_StephenFitzpatrickWarrantInstrumentMember" xlink:label="evtl_StephenFitzpatrickWarrantInstrumentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_WarrantsRecognizedWithinEquityMember" xlink:to="evtl_StephenFitzpatrickWarrantInstrumentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_VirginAtlanticWarrantInstrumentMember" xlink:label="evtl_VirginAtlanticWarrantInstrumentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_WarrantsRecognizedWithinEquityMember" xlink:to="evtl_VirginAtlanticWarrantInstrumentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarcusWaleyCohenOptionMember" xlink:label="evtl_MarcusWaleyCohenOptionMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="evtl_WarrantsRecognizedWithinEquityMember" xlink:to="evtl_MarcusWaleyCohenOptionMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightOutstanding" xlink:label="evtl_IfrsClassOfWarrantOrRightOutstanding" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_IfrsClassOfWarrantOrRightOutstanding" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WarrantReserve" xlink:label="ifrs-full_WarrantReserve" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_WarrantReserve" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureWarrantsAdditionalInformationDetails" xlink:type="extended" xlink:title="99942104 - Disclosure - Warrants - Additional information (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:label="evtl_WarrantsFromUnderwrittenPublicOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_WarrantsFromUnderwrittenPublicOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_WarrantsFromUnderwrittenPublicOfferingMember" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" xlink:label="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_WarrantsMeasuredAtFairValueThroughProfitAndLossMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_StephenFitzpatrickWarrantInstrumentMember" xlink:label="evtl_StephenFitzpatrickWarrantInstrumentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_StephenFitzpatrickWarrantInstrumentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_VirginAtlanticWarrantInstrumentMember" xlink:label="evtl_VirginAtlanticWarrantInstrumentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_VirginAtlanticWarrantInstrumentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarcusWaleyCohenOptionMember" xlink:label="evtl_MarcusWaleyCohenOptionMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_MarcusWaleyCohenOptionMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:label="evtl_IfrsClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_IfrsClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightNumberOfOptionsAwarded" xlink:label="evtl_ClassOfWarrantOrRightNumberOfOptionsAwarded" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_ClassOfWarrantOrRightNumberOfOptionsAwarded" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfWarrantsRequiredToBeExercisedForHolderToReceiveOneShare" xlink:label="evtl_NumberOfWarrantsRequiredToBeExercisedForHolderToReceiveOneShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_NumberOfWarrantsRequiredToBeExercisedForHolderToReceiveOneShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TotalExercisePriceOfWarrantsToReceiveOneShare" xlink:label="evtl_TotalExercisePriceOfWarrantsToReceiveOneShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_TotalExercisePriceOfWarrantsToReceiveOneShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" xlink:label="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromExerciseOfWarrants" xlink:label="ifrs-full_ProceedsFromExerciseOfWarrants" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_ProceedsFromExerciseOfWarrants" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsRedemptionPricePerPublicWarrant" xlink:label="evtl_IfrsRedemptionPricePerPublicWarrant" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_IfrsRedemptionPricePerPublicWarrant" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsWarrantRedemptionConditionMinimumSharePrice" xlink:label="evtl_IfrsWarrantRedemptionConditionMinimumSharePrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_IfrsWarrantRedemptionConditionMinimumSharePrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfDaysDuringWhichEntitySSharesMustTradeAboveThresholdPriceInOrderToTriggerEntitySRightToRedeemWarrants" xlink:label="evtl_NumberOfDaysDuringWhichEntitySSharesMustTradeAboveThresholdPriceInOrderToTriggerEntitySRightToRedeemWarrants" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_NumberOfDaysDuringWhichEntitySSharesMustTradeAboveThresholdPriceInOrderToTriggerEntitySRightToRedeemWarrants" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TradingPeriodDuringWhichSharePriceIsMeasuredToDetermineIfEntitySRightToRedeemWarrantsHasBeenTriggered" xlink:label="evtl_TradingPeriodDuringWhichSharePriceIsMeasuredToDetermineIfEntitySRightToRedeemWarrantsHasBeenTriggered" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_TradingPeriodDuringWhichSharePriceIsMeasuredToDetermineIfEntitySRightToRedeemWarrantsHasBeenTriggered" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightNumberOfWarrantsExercisedDuringPeriod" xlink:label="evtl_ClassOfWarrantOrRightNumberOfWarrantsExercisedDuringPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems" xlink:to="evtl_ClassOfWarrantOrRightNumberOfWarrantsExercisedDuringPeriod" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsFairValueOfEquityInstrumentsGrantedDetails" xlink:type="extended" xlink:title="99942301 - Disclosure - Share-based payments - Fair value of equity instruments granted (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EnterpriseManagementIncentiveSchemeEmiMember" xlink:label="evtl_EnterpriseManagementIncentiveSchemeEmiMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_EnterpriseManagementIncentiveSchemeEmiMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:label="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfEmployeeOptionPlans" xlink:label="evtl_NumberOfEmployeeOptionPlans" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="evtl_NumberOfEmployeeOptionPlans" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:label="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:label="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:label="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" xlink:label="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:label="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsMovementsInNumberAndWeightedAverageExercisePriceOfShareOptionsDetails" xlink:type="extended" xlink:title="99942302 - Disclosure - Share-based payments - Movements in the number and weighted average exercise price of share options (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:label="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EnterpriseManagementIncentiveSchemeEmiMember" xlink:label="evtl_EnterpriseManagementIncentiveSchemeEmiMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_EnterpriseManagementIncentiveSchemeEmiMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOutstandingShareOptions" xlink:label="ifrs-full_NumberOfOutstandingShareOptions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfOutstandingShareOptions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureShareBasedPaymentsShareOptionsDetails" xlink:type="extended" xlink:title="99942303 - Disclosure - Share-based payments - Share options (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:label="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:label="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncentivePlan2021NilCostOptionsMember" xlink:label="evtl_IncentivePlan2021NilCostOptionsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:to="evtl_IncentivePlan2021NilCostOptionsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncentivePlan2021CompanyShareOptionPlanMember" xlink:label="evtl_IncentivePlan2021CompanyShareOptionPlanMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:to="evtl_IncentivePlan2021CompanyShareOptionPlanMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncentivePlan2021CostShareOptionsMember" xlink:label="evtl_IncentivePlan2021CostShareOptionsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:to="evtl_IncentivePlan2021CostShareOptionsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncentivePlan2021PerformanceOptionsMember" xlink:label="evtl_IncentivePlan2021PerformanceOptionsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="evtl_TwoThousandAndTwentyOneIncentiveAwardPlanMember" xlink:to="evtl_IncentivePlan2021PerformanceOptionsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EnterpriseManagementIncentiveSchemeEmiMember" xlink:label="evtl_EnterpriseManagementIncentiveSchemeEmiMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="evtl_EnterpriseManagementIncentiveSchemeEmiMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="ifrs-full_RangeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_TopOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_BottomOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:label="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfOutstandingShareOptions" xlink:label="ifrs-full_NumberOfOutstandingShareOptions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfOutstandingShareOptions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" xlink:label="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:label="ifrs-full_ExercisePriceOfOutstandingShareOptions2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_ExercisePriceOfOutstandingShareOptions2019" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019" xlink:label="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossConvertibleSeniorSecuredNotesDetails" xlink:type="extended" xlink:title="99942401 - Disclosure - Financial liabilities at fair value through profit and loss - Convertible Senior Secured Notes (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CounterpartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CounterpartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFinancialLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" xlink:label="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseInFinancialLiabilitiesPaymentOfInKindInterest" xlink:label="evtl_IncreaseDecreaseInFinancialLiabilitiesPaymentOfInKindInterest" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_IncreaseDecreaseInFinancialLiabilitiesPaymentOfInKindInterest" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" xlink:label="ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_GainsLossesRecognisedInProfitOrLossOnExchangeDifferencesFairValueMeasurementLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseInFairValueLiabilitiesThroughChangesInFairValueFromOwnCreditRisk" xlink:label="evtl_IncreaseDecreaseInFairValueLiabilitiesThroughChangesInFairValueFromOwnCreditRisk" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_IncreaseDecreaseInFairValueLiabilitiesThroughChangesInFairValueFromOwnCreditRisk" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FinancialLiabilitiesBeforeSubstantialModification" xlink:label="evtl_FinancialLiabilitiesBeforeSubstantialModification" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_FinancialLiabilitiesBeforeSubstantialModification" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ImpactOfRecognitionOfModifiedLoanOnFairValue" xlink:label="evtl_ImpactOfRecognitionOfModifiedLoanOnFairValue" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_ImpactOfRecognitionOfModifiedLoanOnFairValue" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DecreaseInFinancialLiabilityFromConversionOfConvertibleInstruments" xlink:label="evtl_DecreaseInFinancialLiabilityFromConversionOfConvertibleInstruments" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_DecreaseInFinancialLiabilityFromConversionOfConvertibleInstruments" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FinancialLiabilitiesAfterSubstantialModification" xlink:label="evtl_FinancialLiabilitiesAfterSubstantialModification" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_FinancialLiabilitiesAfterSubstantialModification" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialLiabilitiesAtFairValueThroughProfitAndLossAdditionalInformationDetails" xlink:type="extended" xlink:title="99942402 - Disclosure - Financial liabilities at fair value through profit and loss - Additional Information (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_BorrowingsByNameAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_BorrowingsByNameDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="srt_StatementScenarioAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInCashMember" xlink:label="evtl_InterestPaidInCashMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInCashMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FirstHalfOfPrincipalAmountMember" xlink:label="evtl_FirstHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_FirstHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RemainingHalfOfPrincipalAmountMember" xlink:label="evtl_RemainingHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_RemainingHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" xlink:label="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_CounterpartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CounterpartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_TypesOfAntidilutiveInstrumentsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:label="ifrs-full_TypesOfAntidilutiveInstrumentsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfAntidilutiveInstrumentsAxis" xlink:to="ifrs-full_TypesOfAntidilutiveInstrumentsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConvertibleInstrumentsMember" xlink:label="ifrs-full_ConvertibleInstrumentsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfAntidilutiveInstrumentsDomain" xlink:to="ifrs-full_ConvertibleInstrumentsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" use="optional" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:label="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="ifrs-full_NotionalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_NotionalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtInstrumentConvertibleNumberOfEquityInstruments" xlink:label="evtl_IfrsDebtInstrumentConvertibleNumberOfEquityInstruments" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtInstrumentConvertibleNumberOfEquityInstruments" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" xlink:label="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" xlink:label="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_ConvertibleSeniorSecuredNotesPrincipalAmountPerIndividualInstrument" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionOriginalDebtAmount" xlink:label="evtl_IfrsDebtConversionOriginalDebtAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtConversionOriginalDebtAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtInstrumentConvertibleConversionPrice" xlink:label="evtl_IfrsDebtInstrumentConvertibleConversionPrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtInstrumentConvertibleConversionPrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" xlink:label="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_IfrsDebtConversionConvertedInstrumentSharesIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerShare" xlink:label="evtl_MarketValuePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_MarketValuePerShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CovenantForRetentionOfCashUnderContract" xlink:label="evtl_CovenantForRetentionOfCashUnderContract" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_CovenantForRetentionOfCashUnderContract" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CashAtBankHeldToSatisfyCovenantUnderContract" xlink:label="evtl_CashAtBankHeldToSatisfyCovenantUnderContract" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="evtl_CashAtBankHeldToSatisfyCovenantUnderContract" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialAssetsAtAmortizedCostDetails" xlink:type="extended" xlink:title="99942501 - Disclosure - Financial instruments - Financial assets at amortized cost (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable" xlink:label="ifrs-full_DisclosureOfFinancialAssetsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:label="ifrs-full_CategoriesOfFinancialAssetsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_CategoriesOfFinancialAssetsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain" xlink:label="ifrs-full_CategoriesOfFinancialAssetsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialAssetsAxis" xlink:to="ifrs-full_CategoriesOfFinancialAssetsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialAssetsDomain" xlink:to="ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_ClassesOfFinancialAssetsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="ifrs-full_TradeReceivablesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="ifrs-full_TradeReceivablesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsCashAndCashEquivalentsMember" xlink:label="evtl_IfrsCashAndCashEquivalentsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="evtl_IfrsCashAndCashEquivalentsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RestrictedCashMember" xlink:label="evtl_RestrictedCashMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="evtl_RestrictedCashMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:label="ifrs-full_DisclosureOfFinancialAssetsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_DisclosureOfFinancialAssetsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="ifrs-full_FinancialAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_FinancialAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtFairValue" xlink:label="ifrs-full_FinancialAssetsAtFairValue" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="ifrs-full_FinancialAssetsAtFairValue" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialLiabilitiesAtAmortizedCostDetails" xlink:type="extended" xlink:title="99942502 - Disclosure - Financial instruments - Financial liabilities at amortized cost (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TradeAndOtherPayablesMember" xlink:label="evtl_TradeAndOtherPayablesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_TradeAndOtherPayablesMember" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember" xlink:label="ifrs-full_LeaseLiabilitiesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_LeaseLiabilitiesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFinancialLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValue" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValue" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValue" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFinancialLiabilitiesAtFairValueThroughProfitOrLossDetails" xlink:type="extended" xlink:title="99942503 - Disclosure - Financial instruments - Financial liabilities at fair value through profit or loss (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_WarrantLiabilitiesMember" xlink:label="evtl_WarrantLiabilitiesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_WarrantLiabilitiesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:label="ifrs-full_LevelsOfFairValueHierarchyDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_LevelsOfFairValueHierarchyDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFinancialLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValue" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValue" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValue" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerWarrant" xlink:label="evtl_MarketValuePerWarrant" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_MarketValuePerWarrant" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsFairValueOfConvertibleSeniorSecuredNotesDetails" xlink:type="extended" xlink:title="99942504 - Disclosure - Financial instruments - Fair value of the convertible senior secured notes (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsAxis" xlink:label="ifrs-full_UnobservableInputsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" xlink:to="ifrs-full_UnobservableInputsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsDomain" xlink:label="ifrs-full_UnobservableInputsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_UnobservableInputsAxis" xlink:to="ifrs-full_UnobservableInputsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnobservableInputsAxisSharePriceMeasurementInputMember" xlink:label="evtl_UnobservableInputsAxisSharePriceMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="evtl_UnobservableInputsAxisSharePriceMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnobservableInputsAxisConversionPriceMeasurementInputMember" xlink:label="evtl_UnobservableInputsAxisConversionPriceMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="evtl_UnobservableInputsAxisConversionPriceMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRateMeasurementInputMember" xlink:label="ifrs-full_InterestRateMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="ifrs-full_InterestRateMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsMeasurementInputExpectedTermMember" xlink:label="evtl_IfrsMeasurementInputExpectedTermMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="evtl_IfrsMeasurementInputExpectedTermMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RiskFreeRateMeasurementInputMember" xlink:label="evtl_RiskFreeRateMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="evtl_RiskFreeRateMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsMeasurementInputExpectedDividendRateMember" xlink:label="evtl_IfrsMeasurementInputExpectedDividendRateMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="evtl_IfrsMeasurementInputExpectedDividendRateMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:label="ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CreditSpreadMeasurementInputMember" xlink:label="ifrs-full_CreditSpreadMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="ifrs-full_CreditSpreadMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantUnobservableInputLiabilities" xlink:label="ifrs-full_SignificantUnobservableInputLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" xlink:to="ifrs-full_SignificantUnobservableInputLiabilities" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialInstrumentsAdditionalInformationDetails" xlink:type="extended" xlink:title="99942505 - Disclosure - Financial instruments - Additional Information (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:label="ifrs-full_ClassesOfFinancialInstrumentsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:to="ifrs-full_ClassesOfFinancialInstrumentsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleNoteMember" xlink:label="evtl_ConvertibleNoteMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_ClassesOfFinancialInstrumentsDomain" xlink:to="evtl_ConvertibleNoteMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfFinancialLiabilitiesDomain" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:label="ifrs-full_LevelsOfFairValueHierarchyAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_LevelsOfFairValueHierarchyAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:label="ifrs-full_LevelsOfFairValueHierarchyDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:to="ifrs-full_LevelsOfFairValueHierarchyDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Level3OfFairValueHierarchyMember" xlink:label="ifrs-full_Level3OfFairValueHierarchyMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_LevelsOfFairValueHierarchyDomain" xlink:to="ifrs-full_Level3OfFairValueHierarchyMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="srt_StatementScenarioAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInCashMember" xlink:label="evtl_InterestPaidInCashMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInCashMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" xlink:label="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_InterestPaidInKindAndSemiAnnuallyInArrearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FirstHalfOfPrincipalAmountMember" xlink:label="evtl_FirstHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_FirstHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_RemainingHalfOfPrincipalAmountMember" xlink:label="evtl_RemainingHalfOfPrincipalAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evtl_RemainingHalfOfPrincipalAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="6" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_RangeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_BottomOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_TopOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis" xlink:label="ifrs-full_CounterpartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="7" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_CounterpartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain" xlink:label="ifrs-full_CounterpartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CounterpartiesAxis" xlink:to="ifrs-full_CounterpartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CounterpartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsAxis" xlink:label="ifrs-full_UnobservableInputsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="8" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesTable" xlink:to="ifrs-full_UnobservableInputsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UnobservableInputsDomain" xlink:label="ifrs-full_UnobservableInputsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_UnobservableInputsAxis" xlink:to="ifrs-full_UnobservableInputsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CreditSpreadMeasurementInputMember" xlink:label="ifrs-full_CreditSpreadMeasurementInputMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_UnobservableInputsDomain" xlink:to="ifrs-full_CreditSpreadMeasurementInputMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:label="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_DisclosureOfFinancialLiabilitiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseForFinancialLiabilitiesNotAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_InterestExpenseForFinancialLiabilitiesNotAtFairValueThroughProfitOrLoss" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_InterestExpenseForFinancialLiabilitiesNotAtFairValueThroughProfitOrLoss" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsMaturity" xlink:label="ifrs-full_BorrowingsMaturity" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_BorrowingsMaturity" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate" xlink:label="ifrs-full_BorrowingsInterestRate" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_BorrowingsInterestRate" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" xlink:label="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_ConversionRatioInSharesPer1000DollarPrincipalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesPrincipalAmount" xlink:label="evtl_ConvertibleSeniorSecuredNotesPrincipalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_ConvertibleSeniorSecuredNotesPrincipalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsDebtConversionConvertedInstrumentAmount" xlink:label="evtl_IfrsDebtConversionConvertedInstrumentAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_IfrsDebtConversionConvertedInstrumentAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PrincipalAmountOutstandingOnBorrowings" xlink:label="evtl_PrincipalAmountOutstandingOnBorrowings" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_PrincipalAmountOutstandingOnBorrowings" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MarketValuePerShare" xlink:label="evtl_MarketValuePerShare" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_MarketValuePerShare" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSharePrice" xlink:label="evtl_IfrsSharePrice" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_IfrsSharePrice" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TermOfUsGovernmentDebtToCalculateInterestRateFairValueMeasurementInputs" xlink:label="evtl_TermOfUsGovernmentDebtToCalculateInterestRateFairValueMeasurementInputs" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_TermOfUsGovernmentDebtToCalculateInterestRateFairValueMeasurementInputs" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_HistoricalSharePriceVolatilityPeriodOfComparableCompaniesFairValueMeasurementInputs" xlink:label="evtl_HistoricalSharePriceVolatilityPeriodOfComparableCompaniesFairValueMeasurementInputs" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_HistoricalSharePriceVolatilityPeriodOfComparableCompaniesFairValueMeasurementInputs" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:label="ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities" xlink:label="ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputLiabilities" xlink:label="ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:label="ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleDecreaseInUnobservableInputLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleDecreaseInUnobservableInputLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount" xlink:label="ifrs-full_NotionalAmount" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="19" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_NotionalAmount" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" xlink:label="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="20" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PercentageOfIncreaseInCompanySOwnCreditSpreadDuringPeriod" xlink:label="evtl_PercentageOfIncreaseInCompanySOwnCreditSpreadDuringPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="21" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="evtl_PercentageOfIncreaseInCompanySOwnCreditSpreadDuringPeriod" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValue" xlink:label="ifrs-full_FinancialLiabilitiesAtFairValue" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="22" xlink:from="ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:to="ifrs-full_FinancialLiabilitiesAtFairValue" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsCreditRiskAndImpairmentDetails" xlink:type="extended" xlink:title="99942601 - Disclosure - Financial risk management and impairment of financial assets - Credit risk and impairment (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:label="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis" xlink:label="ifrs-full_TypesOfRisksAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="ifrs-full_TypesOfRisksAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain" xlink:label="ifrs-full_TypesOfRisksDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_TypesOfRisksAxis" xlink:to="ifrs-full_TypesOfRisksDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CreditRiskMember" xlink:label="ifrs-full_CreditRiskMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_TypesOfRisksDomain" xlink:to="ifrs-full_CreditRiskMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrencyRiskMember" xlink:label="ifrs-full_CurrencyRiskMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_TypesOfRisksDomain" xlink:to="ifrs-full_CurrencyRiskMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis" xlink:label="srt_CurrencyAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="srt_CurrencyAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain" xlink:label="currency_AllCurrenciesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="srt_CurrencyAxis" xlink:to="currency_AllCurrenciesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_USD" xlink:label="currency_USD" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="currency_AllCurrenciesDomain" xlink:to="currency_USD" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis" xlink:label="ifrs-full_ClassesOfFinancialAssetsAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="ifrs-full_ClassesOfFinancialAssetsAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain" xlink:label="ifrs-full_ClassesOfFinancialAssetsDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="ifrs-full_ClassesOfFinancialAssetsDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember" xlink:label="ifrs-full_TradeReceivablesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="ifrs-full_TradeReceivablesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:label="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember" xlink:label="ifrs-full_CarryingAmountMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="ifrs-full_CarryingAmountMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember" xlink:label="ifrs-full_AccumulatedImpairmentMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CarryingAmountMember" xlink:to="ifrs-full_AccumulatedImpairmentMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockAxis" xlink:label="evtl_IfrsSaleOfStockAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="evtl_IfrsSaleOfStockAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsSaleOfStockDomain" xlink:label="evtl_IfrsSaleOfStockDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsSaleOfStockAxis" xlink:to="evtl_IfrsSaleOfStockDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJanuary2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJanuary2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJanuary2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnderwrittenPublicOfferingJuly2025Member" xlink:label="evtl_UnderwrittenPublicOfferingJuly2025Member" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_UnderwrittenPublicOfferingJuly2025Member" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_AtMarketOfferingMember" xlink:label="evtl_AtMarketOfferingMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_IfrsSaleOfStockDomain" xlink:to="evtl_AtMarketOfferingMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentRestrictedCashAndCashEquivalents" xlink:label="ifrs-full_CurrentRestrictedCashAndCashEquivalents" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_CurrentRestrictedCashAndCashEquivalents" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaximumExposureToCreditRisk" xlink:label="ifrs-full_MaximumExposureToCreditRisk" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_MaximumExposureToCreditRisk" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets" xlink:label="ifrs-full_FinancialAssets" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_FinancialAssets" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_PercentageOfReasonablyPossibleDecreaseInRiskAssumption" xlink:label="evtl_PercentageOfReasonablyPossibleDecreaseInRiskAssumption" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="evtl_PercentageOfReasonablyPossibleDecreaseInRiskAssumption" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseInProfitLossFromReasonablyPossibleDecreaseInRiskAssumption" xlink:label="evtl_IncreaseDecreaseInProfitLossFromReasonablyPossibleDecreaseInRiskAssumption" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="evtl_IncreaseDecreaseInProfitLossFromReasonablyPossibleDecreaseInRiskAssumption" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IncreaseDecreaseInOtherComprehensiveIncomeLossFromReasonablyPossibleDecreaseInRiskAssumption" xlink:label="evtl_IncreaseDecreaseInOtherComprehensiveIncomeLossFromReasonablyPossibleDecreaseInRiskAssumption" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="evtl_IncreaseDecreaseInOtherComprehensiveIncomeLossFromReasonablyPossibleDecreaseInRiskAssumption" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BalancesWithBanks" xlink:label="ifrs-full_BalancesWithBanks" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_BalancesWithBanks" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NetProceedsFromIssueOfSharesAndWarrants" xlink:label="evtl_NetProceedsFromIssueOfSharesAndWarrants" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="evtl_NetProceedsFromIssueOfSharesAndWarrants" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureFinancialRiskManagementAndImpairmentOfFinancialAssetsMaturityAnalysisDetails" xlink:type="extended" xlink:title="99942602 - Disclosure - Financial risk management and impairment of financial assets - Maturity analysis (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:label="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:label="ifrs-full_ClassesOfFinancialLiabilitiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesAxis" xlink:to="ifrs-full_ClassesOfFinancialLiabilitiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" xlink:label="evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_ClassesOfFinancialLiabilitiesDomain" xlink:to="evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TradeAndOtherPayablesMember" xlink:label="evtl_TradeAndOtherPayablesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" xlink:to="evtl_TradeAndOtherPayablesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember" xlink:label="ifrs-full_LeaseLiabilitiesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" xlink:to="ifrs-full_LeaseLiabilitiesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="evtl_FinancialLiabilitiesForWhichMaturityIsDisclosedMember" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis" xlink:label="ifrs-full_MaturityAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" xlink:to="ifrs-full_MaturityAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain" xlink:label="ifrs-full_MaturityDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_MaturityAxis" xlink:to="ifrs-full_MaturityDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember" xlink:label="ifrs-full_NotLaterThanOneYearMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_NotLaterThanOneYearMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember" xlink:label="ifrs-full_LaterThanFiveYearsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_MaturityDomain" xlink:to="ifrs-full_LaterThanFiveYearsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:label="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities" xlink:label="ifrs-full_FinancialLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_FinancialLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows" xlink:label="ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows" xlink:label="ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DerivativeAndNonDerivativeFinancialLiabilitiesUndiscountedCashFlows" xlink:label="evtl_DerivativeAndNonDerivativeFinancialLiabilitiesUndiscountedCashFlows" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems" xlink:to="evtl_DerivativeAndNonDerivativeFinancialLiabilitiesUndiscountedCashFlows" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsSummaryOfTransactionsWithOtherRelatedPartiesDetails" xlink:type="extended" xlink:title="99942702 - Disclosure - Related party transactions - Summary of transactions with other related parties (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_StuartSimpsonMember" xlink:label="evtl_StuartSimpsonMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_StuartSimpsonMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_DmhnalSlatteryMember" xlink:label="evtl_DmhnalSlatteryMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_DmhnalSlatteryMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClahaneCapitalSezcLtdMember" xlink:label="evtl_ClahaneCapitalSezcLtdMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_ClahaneCapitalSezcLtdMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IndependentMembersOfBoardOfDirectorsMember" xlink:label="evtl_IndependentMembersOfBoardOfDirectorsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_IndependentMembersOfBoardOfDirectorsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_KeyManagementPersonnelCompensationShortTermEmployeeBenefitsBonuses" xlink:label="evtl_KeyManagementPersonnelCompensationShortTermEmployeeBenefitsBonuses" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_KeyManagementPersonnelCompensationShortTermEmployeeBenefitsBonuses" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_GainOnDirectorsExerciseOfShareOptions" xlink:label="evtl_GainOnDirectorsExerciseOfShareOptions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_GainOnDirectorsExerciseOfShareOptions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" xlink:label="evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:label="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ServicesReceivedRelatedPartyTransactions" xlink:label="ifrs-full_ServicesReceivedRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_ServicesReceivedRelatedPartyTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_AmountsPayableRelatedPartyTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfShareOptionsAndOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" xlink:label="evtl_NumberOfShareOptionsAndOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_NumberOfShareOptionsAndOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" priority="1" use="optional" />
  </definitionLink>
  <definitionLink xlink:role="http://www.deitaxonomy.com/role/DisclosureRelatedPartyTransactionsTransactionsWithMudrickCapitalAndStephenFitzpatrickDetails" xlink:type="extended" xlink:title="99942703 - Disclosure - Related party transactions - Transactions with Mudrick capital and Stephen Fitzpatrick (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis" xlink:label="ifrs-full_RangeAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_RangeAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain" xlink:label="ifrs-full_RangeDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_RangeAxis" xlink:to="ifrs-full_RangeDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember" xlink:label="ifrs-full_BottomOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_BottomOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember" xlink:label="ifrs-full_TopOfRangeMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_RangeDomain" xlink:to="ifrs-full_TopOfRangeMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:label="ifrs-full_CategoriesOfRelatedPartiesAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="2" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_CategoriesOfRelatedPartiesAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:label="ifrs-full_CategoriesOfRelatedPartiesDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:to="ifrs-full_CategoriesOfRelatedPartiesDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MudrickCapitalManagementMember" xlink:label="evtl_MudrickCapitalManagementMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_MudrickCapitalManagementMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ImaginationIndustriesInvestmentsLtdMember" xlink:label="evtl_ImaginationIndustriesInvestmentsLtdMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_ImaginationIndustriesInvestmentsLtdMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_StephenFitzpatrickMember" xlink:label="evtl_StephenFitzpatrickMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_CategoriesOfRelatedPartiesDomain" xlink:to="evtl_StephenFitzpatrickMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis" xlink:label="ifrs-full_BorrowingsByNameAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="3" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_BorrowingsByNameAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain" xlink:label="ifrs-full_BorrowingsByNameDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_BorrowingsByNameAxis" xlink:to="ifrs-full_BorrowingsByNameDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ConvertibleSeniorSecuredNotesMember" xlink:label="evtl_ConvertibleSeniorSecuredNotesMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_BorrowingsByNameDomain" xlink:to="evtl_ConvertibleSeniorSecuredNotesMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightAxis" xlink:label="evtl_IfrsClassOfWarrantOrRightAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="4" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="evtl_IfrsClassOfWarrantOrRightAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsClassOfWarrantOrRightDomain" xlink:label="evtl_IfrsClassOfWarrantOrRightDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightAxis" xlink:to="evtl_IfrsClassOfWarrantOrRightDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheWarrantMember" xlink:label="evtl_TrancheWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_TrancheBWarrantMember" xlink:label="evtl_TrancheBWarrantMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="evtl_IfrsClassOfWarrantOrRightDomain" xlink:to="evtl_TrancheBWarrantMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" order="5" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:label="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" order="1" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodAxis" xlink:to="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MajorOrdinaryShareTransactionsMember" xlink:label="ifrs-full_MajorOrdinaryShareTransactionsMember" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="1" xlink:from="ifrs-full_NonadjustingEventsAfterReportingPeriodDomain" xlink:to="ifrs-full_MajorOrdinaryShareTransactionsMember" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:label="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" order="1" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" use="optional" xbrldt:contextElement="segment" xbrldt:closed="true" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" xlink:label="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="2" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementLiabilities" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseOnFinancialLiabilitiesDesignatedAtFairValueThroughProfitOrLoss" xlink:label="ifrs-full_InterestExpenseOnFinancialLiabilitiesDesignatedAtFairValueThroughProfitOrLoss" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="3" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_InterestExpenseOnFinancialLiabilitiesDesignatedAtFairValueThroughProfitOrLoss" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ProceedsFromIssuanceOfUnits" xlink:label="evtl_ProceedsFromIssuanceOfUnits" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="4" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_ProceedsFromIssuanceOfUnits" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:label="evtl_UnitsIssuedDuringPeriodUnitsNewIssues" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="5" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_UnitsIssuedDuringPeriodUnitsNewIssues" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfSharesPerUnit" xlink:label="evtl_NumberOfSharesPerUnit" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="6" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_NumberOfSharesPerUnit" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_NumberOfWarrantsPerUnit" xlink:label="evtl_NumberOfWarrantsPerUnit" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="7" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_NumberOfWarrantsPerUnit" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsWarrantsAndRightsOutstandingTerm" xlink:label="evtl_IfrsWarrantsAndRightsOutstandingTerm" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="8" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_IfrsWarrantsAndRightsOutstandingTerm" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" xlink:label="evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="9" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_EmploymentContractAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_OtherRelatedPartiesAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" xlink:label="evtl_OtherRelatedPartiesAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="10" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_OtherRelatedPartiesAntiDilutionProvisionRelatedPartySRightOfOwnershipAfterAnyAwardsAreIssued" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_MinimumOwnershipInterestOfRelatedPartyToEntitlePartyToParticipateInFutureEquityOfferings" xlink:label="evtl_MinimumOwnershipInterestOfRelatedPartyToEntitlePartyToParticipateInFutureEquityOfferings" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="11" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_MinimumOwnershipInterestOfRelatedPartyToEntitlePartyToParticipateInFutureEquityOfferings" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" xlink:label="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="12" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_ClassOfWarrantOrRightExercisePriceOfWarrantOrRights" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="13" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_ProceedsFromIssuingShares" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" xlink:label="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="14" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_IfrsStockIssuedDuringPeriodSharesNewIssues" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_CapitalCommitmentOptionPeriod" xlink:label="evtl_CapitalCommitmentOptionPeriod" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="15" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_CapitalCommitmentOptionPeriod" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="evtl-20251231.xsd#evtl_InvestmentOptionAfterNotExercisingCapitalCommitmentRight" xlink:label="evtl_InvestmentOptionAfterNotExercisingCapitalCommitmentRight" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="16" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="evtl_InvestmentOptionAfterNotExercisingCapitalCommitmentRight" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ServicesReceivedRelatedPartyTransactions" xlink:label="ifrs-full_ServicesReceivedRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="17" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_ServicesReceivedRelatedPartyTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions" xlink:label="ifrs-full_AmountsPayableRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="18" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_AmountsPayableRelatedPartyTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" xlink:label="ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="19" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions" priority="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmountsReceivableRelatedPartyTransactions" xlink:label="ifrs-full_AmountsReceivableRelatedPartyTransactions" />
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" order="20" xlink:from="ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:to="ifrs-full_AmountsReceivableRelatedPartyTransactions" priority="1" use="optional" />
  </definitionLink>
</link:linkbase>
