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      <link:roleType id="OTHERFINANCIALASSETSATAMORTISEDCOSTTables" roleURI="http://santander.co.uk/role/OTHERFINANCIALASSETSATAMORTISEDCOSTTables">
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      <link:roleType id="DEPOSITSBYCUSTOMERSTables" roleURI="http://santander.co.uk/role/DEPOSITSBYCUSTOMERSTables">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      </link:roleType>
      <link:roleType id="REPURCHASEAGREEMENTSNONTRADINGTables" roleURI="http://santander.co.uk/role/REPURCHASEAGREEMENTSNONTRADINGTables">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OTHERFINANCIALLIABILITIESATFAIRVALUETHROUGHPROFITORLOSSTables" roleURI="http://santander.co.uk/role/OTHERFINANCIALLIABILITIESATFAIRVALUETHROUGHPROFITORLOSSTables">
        <link:definition>9955530 - Disclosure - OTHER FINANCIAL LIABILITIES AT FAIR VALUE THROUGH PROFIT OR LOSS (Tables)</link:definition>
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      </link:roleType>
      <link:roleType id="DEBTSECURITIESINISSUETables" roleURI="http://santander.co.uk/role/DEBTSECURITIESINISSUETables">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="PROVISIONSTables" roleURI="http://santander.co.uk/role/PROVISIONSTables">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      </link:roleType>
      <link:roleType id="RETIREMENTBENEFITPLANSTables" roleURI="http://santander.co.uk/role/RETIREMENTBENEFITPLANSTables">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUBORDINATEDLIABILITIESTables" roleURI="http://santander.co.uk/role/SUBORDINATEDLIABILITIESTables">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONTINGENTLIABILITIESANDCOMMITMENTSTables" roleURI="http://santander.co.uk/role/CONTINGENTLIABILITIESANDCOMMITMENTSTables">
        <link:definition>9955535 - Disclosure - CONTINGENT LIABILITIES AND COMMITMENTS (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OTHEREQUITYINSTRUMENTSTables" roleURI="http://santander.co.uk/role/OTHEREQUITYINSTRUMENTSTables">
        <link:definition>9955536 - Disclosure - OTHER EQUITY INSTRUMENTS (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FINANCIALINSTRUMENTSTables" roleURI="http://santander.co.uk/role/FINANCIALINSTRUMENTSTables">
        <link:definition>9955537 - Disclosure - FINANCIAL INSTRUMENTS (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACQUISITIONOFTSBTables" roleURI="http://santander.co.uk/role/ACQUISITIONOFTSBTables">
        <link:definition>9955538 - Disclosure - ACQUISITION OF TSB (Tables)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CreditRiskDisclosureofBaseExpectedCreditLossestoProbabilityWeightedEstimatedCreditLossesDetails" roleURI="http://santander.co.uk/role/CreditRiskDisclosureofBaseExpectedCreditLossestoProbabilityWeightedEstimatedCreditLossesDetails">
        <link:definition>9955539 - Disclosure - Credit Risk - Disclosure of Base Expected Credit Losses to Probability Weighted Estimated Credit Losses (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="CreditRiskDisclosureofECLReconciliationDetails" roleURI="http://santander.co.uk/role/CreditRiskDisclosureofECLReconciliationDetails">
        <link:definition>9955540 - Disclosure - Credit Risk - Disclosure of ECL Reconciliation (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="CapitalRiskSummaryofRegulatoryCapitalResourcesDetails" roleURI="http://santander.co.uk/role/CapitalRiskSummaryofRegulatoryCapitalResourcesDetails">
        <link:definition>9955541 - Disclosure - Capital Risk - Summary of Regulatory Capital Resources (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="MarketRiskYieldCurveRiskDetails" roleURI="http://santander.co.uk/role/MarketRiskYieldCurveRiskDetails">
        <link:definition>9955542 - Disclosure - Market Risk - Yield Curve Risk (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ACCOUNTINGPOLICIESChangeinaccountingpolicyDetails" roleURI="http://santander.co.uk/role/ACCOUNTINGPOLICIESChangeinaccountingpolicyDetails">
        <link:definition>9955543 - Disclosure - ACCOUNTING POLICIES - Change in accounting policy (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="ACCOUNTINGPOLICIESCriticaljudgementsandaccountingestimatesDetails" roleURI="http://santander.co.uk/role/ACCOUNTINGPOLICIESCriticaljudgementsandaccountingestimatesDetails">
        <link:definition>9955544 - Disclosure - ACCOUNTING POLICIES - Critical judgements and accounting estimates (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="SEGMENTSAdditionalInformationDetails" roleURI="http://santander.co.uk/role/SEGMENTSAdditionalInformationDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SEGMENTSSummaryofResultsbySegmentDetails" roleURI="http://santander.co.uk/role/SEGMENTSSummaryofResultsbySegmentDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="SEGMENTSScheduleOfRelationshipbetweenCustomerAssetsandLoansandAdvancesDetails" roleURI="http://santander.co.uk/role/SEGMENTSScheduleOfRelationshipbetweenCustomerAssetsandLoansandAdvancesDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="OPERATINGEXPENSESBEFORECREDITIMPAIRMENTCHARGESRESTRUCTURINGANDSPECIFICPROVISIONSAdditionalInformationDetails" roleURI="http://santander.co.uk/role/OPERATINGEXPENSESBEFORECREDITIMPAIRMENTCHARGESRESTRUCTURINGANDSPECIFICPROVISIONSAdditionalInformationDetails">
        <link:definition>9955549 - Disclosure - OPERATING EXPENSES BEFORE CREDIT IMPAIRMENT CHARGES, RESTRUCTURING AND SPECIFIC PROVISIONS - Additional Information (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="CREDITIMPAIRMENTCHARGESSummaryofImpairmentLossesandProvisionsDetails" roleURI="http://santander.co.uk/role/CREDITIMPAIRMENTCHARGESSummaryofImpairmentLossesandProvisionsDetails">
        <link:definition>9955550 - Disclosure - CREDIT IMPAIRMENT CHARGES - Summary of Impairment Losses and Provisions (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="CREDITIMPAIRMENTCHARGESAdditionalInformationDetails" roleURI="http://santander.co.uk/role/CREDITIMPAIRMENTCHARGESAdditionalInformationDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="TAXATIONAdditionalInformationDetails" roleURI="http://santander.co.uk/role/TAXATIONAdditionalInformationDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="TAXATIONScheduleofTaxonProfitBeforeTaxDiffersfromTheoreticalAmountthatAriseUsingBasicCorporationTaxRateDetails" roleURI="http://santander.co.uk/role/TAXATIONScheduleofTaxonProfitBeforeTaxDiffersfromTheoreticalAmountthatAriseUsingBasicCorporationTaxRateDetails">
        <link:definition>9955553 - Disclosure - TAXATION - Schedule of Tax on Profit Before Tax Differs from Theoretical Amount that Arise Using Basic Corporation Tax Rate (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="DIVIDENDSONORDINARYSHARESDetails" roleURI="http://santander.co.uk/role/DIVIDENDSONORDINARYSHARESDetails">
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      <link:roleType id="DERIVATIVEFINANCIALINSTRUMENTSDetails" roleURI="http://santander.co.uk/role/DERIVATIVEFINANCIALINSTRUMENTSDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType id="OTHERFINANCIALASSETSATFAIRVALUETHROUGHPROFITORLOSSDetails" roleURI="http://santander.co.uk/role/OTHERFINANCIALASSETSATFAIRVALUETHROUGHPROFITORLOSSDetails">
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      <link:roleType id="LOANSANDADVANCESTOCUSTOMERSDetails" roleURI="http://santander.co.uk/role/LOANSANDADVANCESTOCUSTOMERSDetails">
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      <link:roleType id="SECURITISATIONSANDCOVEREDBONDSAdditionalInformationDetails" roleURI="http://santander.co.uk/role/SECURITISATIONSANDCOVEREDBONDSAdditionalInformationDetails">
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      <link:roleType id="SECURITISATIONSANDCOVEREDBONDSDisclosureofAnalysisofSecuritisationsandCoveredBondsDetails" roleURI="http://santander.co.uk/role/SECURITISATIONSANDCOVEREDBONDSDisclosureofAnalysisofSecuritisationsandCoveredBondsDetails">
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      <link:roleType id="SECURITISATIONSANDCOVEREDBONDSSummaryofIssuancesandRedemptionsofSecuritisationandCoveredBondProgrammeDetails" roleURI="http://santander.co.uk/role/SECURITISATIONSANDCOVEREDBONDSSummaryofIssuancesandRedemptionsofSecuritisationandCoveredBondProgrammeDetails">
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      <link:roleType id="REVERSEREPURCHASEAGREEMENTSNONTRADINGDetails" roleURI="http://santander.co.uk/role/REVERSEREPURCHASEAGREEMENTSNONTRADINGDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OTHERFINANCIALASSETSATAMORTISEDCOSTDetails" roleURI="http://santander.co.uk/role/OTHERFINANCIALASSETSATAMORTISEDCOSTDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
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      </link:roleType>
      <link:roleType id="INTERESTSINOTHERENTITIESDetails" roleURI="http://santander.co.uk/role/INTERESTSINOTHERENTITIESDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="INTANGIBLEASSETSDetails" roleURI="http://santander.co.uk/role/INTANGIBLEASSETSDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PROPERTYPLANTANDEQUIPMENTDetails" roleURI="http://santander.co.uk/role/PROPERTYPLANTANDEQUIPMENTDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="DEPOSITSBYBANKSDetails" roleURI="http://santander.co.uk/role/DEPOSITSBYBANKSDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="DEPOSITSBYCUSTOMERSDetails" roleURI="http://santander.co.uk/role/DEPOSITSBYCUSTOMERSDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="REPURCHASEAGREEMENTSNONTRADINGDetails" roleURI="http://santander.co.uk/role/REPURCHASEAGREEMENTSNONTRADINGDetails">
        <link:definition>9955568 - Disclosure - REPURCHASE AGREEMENTS &#8211; NON-TRADING (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="OTHERFINANCIALLIABILITIESATFAIRVALUETHROUGHPROFITORLOSSDetails" roleURI="http://santander.co.uk/role/OTHERFINANCIALLIABILITIESATFAIRVALUETHROUGHPROFITORLOSSDetails">
        <link:definition>9955569 - Disclosure - OTHER FINANCIAL LIABILITIES AT FAIR VALUE THROUGH PROFIT OR LOSS (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="DEBTSECURITIESINISSUEDetails" roleURI="http://santander.co.uk/role/DEBTSECURITIESINISSUEDetails">
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType id="PROVISIONSSummaryofProvisionsReconciliationDetails" roleURI="http://santander.co.uk/role/PROVISIONSSummaryofProvisionsReconciliationDetails">
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  <xs:element id="san_DisclosureOfNetLoansAndAdvancesToCustomersTableTextBlock" abstract="false" name="DisclosureOfNetLoansAndAdvancesToCustomersTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfAnalysisOfSecuritisationsAndCoveredBondsTableTextBlock" abstract="false" name="DisclosureOfAnalysisOfSecuritisationsAndCoveredBondsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfIssuancesAndRedemptionsOfSecuritisationAndCoveredBondProgrammesTableTextBlock" abstract="false" name="DisclosureOfIssuancesAndRedemptionsOfSecuritisationAndCoveredBondProgrammesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDetailedInformationOfOtherFinancialAssetsAtAmortisedCostTableTextBlock" abstract="false" name="DisclosureOfDetailedInformationOfOtherFinancialAssetsAtAmortisedCostTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDepositsByBankTableTextBlock" abstract="false" name="DisclosureOfDepositsByBankTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDetailedInformationAboutDepositsFromCustomersTableTextBlock" abstract="false" name="DisclosureOfDetailedInformationAboutDepositsFromCustomersTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DetailedDisclosureOfRepurchaseAgreementsNonTradingTableTextBlock" abstract="false" name="DetailedDisclosureOfRepurchaseAgreementsNonTradingTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossExplanatoryTableTextBlock" abstract="false" name="DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossExplanatoryTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDebtSecuritiesInIssueTableTextBlock" abstract="false" name="DisclosureOfDebtSecuritiesInIssueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfProvisionsReconciliationByClassExplanatoryTableTextBlock" abstract="false" name="DisclosureOfProvisionsReconciliationByClassExplanatoryTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfAmountsRecognisedInOtherComprehensiveIncomeTableTextBlock" abstract="false" name="DisclosureOfAmountsRecognisedInOtherComprehensiveIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDefinedBenefitPlanActuarialAssumptionsTableTextBlock" abstract="false" name="DisclosureOfDefinedBenefitPlanActuarialAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfDetailsOfSubordinatedLiabilitiesTableTextBlock" abstract="false" name="DisclosureOfDetailsOfSubordinatedLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfCommitmentsContingentLiabilitiesAndGuaranteesTableTextBlock" abstract="false" name="DisclosureOfCommitmentsContingentLiabilitiesAndGuaranteesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfSummaryOfOtherEquityInstrumentsTableTextBlock" abstract="false" name="DisclosureOfSummaryOfOtherEquityInstrumentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfFairValueOfFinancialInstrumentsAtAmortisedCostTableTextBlock" abstract="false" name="DisclosureOfFairValueOfFinancialInstrumentsAtAmortisedCostTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfFairValueOfFinancialInstrumentsAtFairValueTableTextBlock" abstract="false" name="DisclosureOfFairValueOfFinancialInstrumentsAtFairValueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_ScheduleOfFairValueAdjustmentExplanatoryTableTextBlock" abstract="false" name="ScheduleOfFairValueAdjustmentExplanatoryTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_ReconciliationOfFairValueMeasurementsInLevelThreeOfTheFairValueHierarchyTableTextBlock" abstract="false" name="ReconciliationOfFairValueMeasurementsInLevelThreeOfTheFairValueHierarchyTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_DisclosureOfCashFlowFromAcquisitionTableTextBlock" abstract="false" name="DisclosureOfCashFlowFromAcquisitionTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="san_ProjectByScenarioAxis" abstract="true" name="ProjectByScenarioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_ProjectByScenarioDomain" abstract="true" name="ProjectByScenarioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_UpsideOneScenarioMember" abstract="true" name="UpsideOneScenarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_BaseCaseScenarioMember" abstract="true" name="BaseCaseScenarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DownsideOneScenarioMember" abstract="true" name="DownsideOneScenarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DownsideTwoScenarioMember" abstract="true" name="DownsideTwoScenarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_WeightedScenarioMember" abstract="true" name="WeightedScenarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RetailAndBusinessBankingMember" abstract="true" name="RetailAndBusinessBankingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RetailBusinessBankingMortgagesMember" abstract="true" name="RetailBusinessBankingMortgagesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ConsumerFinanceMember" abstract="true" name="ConsumerFinanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CorporateAndCommercialBankingMember" abstract="true" name="CorporateAndCommercialBankingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CorporateCentreMember" abstract="true" name="CorporateCentreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_LoansAndAdvancesToCustomersForResidentialMortgages" abstract="false" name="LoansAndAdvancesToCustomersForResidentialMortgages" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_StageOneMember" abstract="true" name="StageOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StageTwoMember" abstract="true" name="StageTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StageThreeMember" abstract="true" name="StageThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_POCIMember" abstract="true" name="POCIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_TotalExposureMember" abstract="true" name="TotalExposureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StageOneExpectedCreditLossMember" abstract="true" name="StageOneExpectedCreditLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StageTwoExpectedCreditLossMember" abstract="true" name="StageTwoExpectedCreditLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StageThreeExpectedCreditLossMember" abstract="true" name="StageThreeExpectedCreditLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_POCIExpectedCreditLossNettingMember" abstract="true" name="POCIExpectedCreditLossNettingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ExpectedCreditLossMember" abstract="true" name="ExpectedCreditLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughTransfersFromStageOneToStageTwoFinancialAssets" abstract="false" name="IncreaseDecreaseThroughTransfersFromStageOneToStageTwoFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughTransfersFromStageTwoToStageOneFinancialAssets" abstract="false" name="IncreaseDecreaseThroughTransfersFromStageTwoToStageOneFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughTransfersToStageThreeFinancialAssets" abstract="false" name="IncreaseDecreaseThroughTransfersToStageThreeFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughTransfersFromStageThreeFinancialAssets" abstract="false" name="IncreaseDecreaseThroughTransfersFromStageThreeFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughNetRemeasurementOfECLOnStageTransfer" abstract="false" name="IncreaseDecreaseThroughNetRemeasurementOfECLOnStageTransfer" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughChangesInEconomicInputs" abstract="false" name="IncreaseDecreaseThroughChangesInEconomicInputs" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughAcquisitionOfTSBFinancialAssets" abstract="false" name="IncreaseDecreaseThroughAcquisitionOfTSBFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseInTotalFinancialAssets" abstract="false" name="IncreaseDecreaseInTotalFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseInTotalExpectedCreditLosses" abstract="false" name="IncreaseDecreaseInTotalExpectedCreditLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_GrossImpairmentLossIncomeStatementCharge" abstract="false" name="GrossImpairmentLossIncomeStatementCharge" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseThroughECLRelatesToDerecognisedIncome" abstract="false" name="IncreaseDecreaseThroughECLRelatesToDerecognisedIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_FinancialAssetsPostWriteoffRecoveries" abstract="false" name="FinancialAssetsPostWriteoffRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_ECLChargeReleaseToTheIncomeStatementFromContinuedOperations" abstract="false" name="ECLChargeReleaseToTheIncomeStatementFromContinuedOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfRegulatoryCapitalResourcesTable" abstract="true" name="DisclosureOfRegulatoryCapitalResourcesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_ComponentsOfRegulatoryCapitalAxis" abstract="true" name="ComponentsOfRegulatoryCapitalAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_ComponentsOfRegulatoryCapitalDomain" abstract="true" name="ComponentsOfRegulatoryCapitalDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_TransitionalIFRS9BenefitMember" abstract="true" name="TransitionalIFRS9BenefitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfRegulatoryCapitalResourcesLineItems" abstract="true" name="DisclosureOfRegulatoryCapitalResourcesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_CommonEquityTierOneCapitalAmount" abstract="false" name="CommonEquityTierOneCapitalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_AdditionalTierOneCapitalAmount" abstract="false" name="AdditionalTierOneCapitalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TierOneCapitalAmount" abstract="false" name="TierOneCapitalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TierTwoCapitalAmount" abstract="false" name="TierTwoCapitalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_RegulatoryCapital" abstract="false" name="RegulatoryCapital" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfSensitivityLimitOfRiskTable" abstract="true" name="DisclosureOfSensitivityLimitOfRiskTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_KeyAssumptionAppliedAxis" abstract="true" name="KeyAssumptionAppliedAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_KeyAssumptionAppliedDomain" abstract="true" name="KeyAssumptionAppliedDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_IncreaseOfOneHundredBasisPointsMember" abstract="true" name="IncreaseOfOneHundredBasisPointsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DecreaseOfOneHundredBasisPointsMember" abstract="true" name="DecreaseOfOneHundredBasisPointsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfSensitivityLimitOfRiskLineItems" abstract="true" name="DisclosureOfSensitivityLimitOfRiskLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_IncreaseDecreaseInNetInterestIncomeIfAffectedByBasisPointParallelShift" abstract="false" name="IncreaseDecreaseInNetInterestIncomeIfAffectedByBasisPointParallelShift" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TSBMember" abstract="true" name="TSBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_NumberOfSegments" abstract="false" name="NumberOfSegments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NonInterestIncomeExpense" abstract="false" name="NonInterestIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CustomerLoansNet" abstract="false" name="CustomerLoansNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CustomerDepositsNet" abstract="false" name="CustomerDepositsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IntercompanyIncludingJointVenturesMember" abstract="true" name="IntercompanyIncludingJointVenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_LoansAndAdvancesToCustomersExcludingIntercompanyBalancesGross" abstract="false" name="LoansAndAdvancesToCustomersExcludingIntercompanyBalancesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_AllowanceAccountForCreditLossesOfFinancialAssetsForLoansAndAdvancesToCustomers" abstract="false" name="AllowanceAccountForCreditLossesOfFinancialAssetsForLoansAndAdvancesToCustomers" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_LoansAndAdvancesToCustomersNet" abstract="false" name="LoansAndAdvancesToCustomersNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditBalancesInOtherCurrentReceivables" abstract="false" name="CreditBalancesInOtherCurrentReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DepositsFromCustomersGross" abstract="false" name="DepositsFromCustomersGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DepositsFromCustomersNet" abstract="false" name="DepositsFromCustomersNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DebitBalancesInOtherCurrentPayables" abstract="false" name="DebitBalancesInOtherCurrentPayables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OperationalLosses" abstract="false" name="OperationalLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OtherAdministrationExpenses" abstract="false" name="OtherAdministrationExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseDecreaseInOperatingExpenses" abstract="false" name="IncreaseDecreaseInOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentChargesWriteBacksOnLoansAndAdvancesToCustomer" abstract="false" name="CreditImpairmentChargesWriteBacksOnLoansAndAdvancesToCustomer" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OffBalanceSheetCreditExposures" abstract="false" name="OffBalanceSheetCreditExposures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentLossesOnLoansAndAdvancesToBanks" abstract="false" name="CreditImpairmentLossesOnLoansAndAdvancesToBanks" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentLossesOnNonTradingReverseRepurchaseAgreements" abstract="false" name="CreditImpairmentLossesOnNonTradingReverseRepurchaseAgreements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentLossesOnOtherFinancialAssetsAtAmortisedCost" abstract="false" name="CreditImpairmentLossesOnOtherFinancialAssetsAtAmortisedCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentLossesOnFinancialAssetsAtFVOCI" abstract="false" name="CreditImpairmentLossesOnFinancialAssetsAtFVOCI" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CreditImpairmentLosses" abstract="false" name="CreditImpairmentLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TaxEffectOfBankCorporationTaxSurchargeOnProfits" abstract="false" name="TaxEffectOfBankCorporationTaxSurchargeOnProfits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TaxEffectOfNonDeductiblePreferenceDividendsPaid" abstract="false" name="TaxEffectOfNonDeductiblePreferenceDividendsPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TaxEffectOfNonDeductibleUKBankLevy" abstract="false" name="TaxEffectOfNonDeductibleUKBankLevy" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TaxReliefOnDividendsInRespectOfOtherEquityInstruments" abstract="false" name="TaxReliefOnDividendsInRespectOfOtherEquityInstruments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TaxEffectOfPriorYearAdjustments" abstract="false" name="TaxEffectOfPriorYearAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_InflationRateContractsMember" abstract="true" name="InflationRateContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_EquityAndCreditContractsMember" abstract="true" name="EquityAndCreditContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_NettingAdjustmentsMember" abstract="true" name="NettingAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DerivativeAssetsMember" abstract="true" name="DerivativeAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DerivativeLiabilitiesMember" abstract="true" name="DerivativeLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DerivativeInstrumentsAxis" abstract="true" name="DerivativeInstrumentsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_DerivativeInstrumentsDomain" abstract="true" name="DerivativeInstrumentsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DerivativesHeldForTradingMember" abstract="true" name="DerivativesHeldForTradingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DerivativesHeldForHedgingMember" abstract="true" name="DerivativesHeldForHedgingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfFinancialAssetsDesignatedAsMeasuredAtFairValueThroughProfitOrLossTable" abstract="true" name="DisclosureOfFinancialAssetsDesignatedAsMeasuredAtFairValueThroughProfitOrLossTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_LoansAndAdvancesToCustomersMember" abstract="true" name="LoansAndAdvancesToCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherDebtInstrumentsMember" abstract="true" name="OtherDebtInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfOtherFinancialAssetsAtFairValueThroughProfitOrLossLineItems" abstract="true" name="DisclosureOfOtherFinancialAssetsAtFairValueThroughProfitOrLossLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_DisclosureOfDepositsFromCustomersTable" abstract="true" name="DisclosureOfDepositsFromCustomersTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_DisclosureOfDepositsFromCustomersLineItems" abstract="true" name="DisclosureOfDepositsFromCustomersLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_ResidualValueAndVoluntaryTerminationProvisions" abstract="false" name="ResidualValueAndVoluntaryTerminationProvisions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfSecuritisationsAndCoveredBondsTable" abstract="true" name="DisclosureOfSecuritisationsAndCoveredBondsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_TypeOfSecuritisationAxis" abstract="true" name="TypeOfSecuritisationAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_TypeOfSecuritisationDomain" abstract="true" name="TypeOfSecuritisationDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_MasterTrustStructuresMember" abstract="true" name="MasterTrustStructuresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SecuritisationByProgramNameAxis" abstract="true" name="SecuritisationByProgramNameAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_SecuritisationByProgramNameDomain" abstract="true" name="SecuritisationByProgramNameDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ExternalMember" abstract="true" name="ExternalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SecuritisationByCompanyNameAxis" abstract="true" name="SecuritisationByCompanyNameAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_SecuritisationByCompanyNameDomain" abstract="true" name="SecuritisationByCompanyNameDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FosseMember" abstract="true" name="FosseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PoundsSterlingTenBillionGlobalCoveredBondProgrammeMember" abstract="true" name="PoundsSterlingTenBillionGlobalCoveredBondProgrammeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_EuroThirtyFiveBillionGlobalCoveredBondProgrammeMember" abstract="true" name="EuroThirtyFiveBillionGlobalCoveredBondProgrammeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfSecuritisationsAndCoveredBondsLineItems" abstract="true" name="DisclosureOfSecuritisationsAndCoveredBondsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_MortgageBackedNotesSold" abstract="false" name="MortgageBackedNotesSold" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_HolmesMember" abstract="true" name="HolmesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DuncanMember" abstract="true" name="DuncanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ReptonMember" abstract="true" name="ReptonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SecuritisationProgrammesMember" abstract="true" name="SecuritisationProgrammesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CoveredBondProgrammesMember" abstract="true" name="CoveredBondProgrammesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherMortgageBackedSecuritisationStructuresMember" abstract="true" name="OtherMortgageBackedSecuritisationStructuresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherSecuritisationStructuresMember" abstract="true" name="OtherSecuritisationStructuresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_IssuancesAndRedemptionsOfSecuritisationAndCoveredBondTable" abstract="true" name="IssuancesAndRedemptionsOfSecuritisationAndCoveredBondTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_InternalMember" abstract="true" name="InternalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_IssuancesAndRedemptionsOfSecuritisationAndCoveredBondLineItems" abstract="true" name="IssuancesAndRedemptionsOfSecuritisationAndCoveredBondLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_MortgageBackedNotesIssued" abstract="false" name="MortgageBackedNotesIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_MortgageBackedSecuritiesRedeemed" abstract="false" name="MortgageBackedSecuritiesRedeemed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CoveredBondsIssued" abstract="false" name="CoveredBondsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CoveredBondsRedeemed" abstract="false" name="CoveredBondsRedeemed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_SecuritisationsAndCoveredBondsIssued" abstract="false" name="SecuritisationsAndCoveredBondsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_SecuritisationsAndCoveredBondsRedeemed" abstract="false" name="SecuritisationsAndCoveredBondsRedeemed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfReserveRepurchaseAgreementsNonTradingTable" abstract="true" name="DisclosureOfReserveRepurchaseAgreementsNonTradingTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_TypesOfAgreementAxis" abstract="true" name="TypesOfAgreementAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_TypesOfAgreementDomain" abstract="true" name="TypesOfAgreementDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AgreementsWithBanksMember" abstract="true" name="AgreementsWithBanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AgreementsWithCustomersMember" abstract="true" name="AgreementsWithCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfReserveRepurchaseAgreementsNonTradingLineItems" abstract="true" name="DisclosureOfReserveRepurchaseAgreementsNonTradingLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_FinancialAssetsAtFairValueThroughProfitOrLossTable" abstract="true" name="FinancialAssetsAtFairValueThroughProfitOrLossTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_OtherFinancialAssets1Member" abstract="true" name="OtherFinancialAssets1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FinancialAssetsAtFairValueThroughProfitOrLossLineItems" abstract="true" name="FinancialAssetsAtFairValueThroughProfitOrLossLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_TSBCoveredBondsLMMember" abstract="true" name="TSBCoveredBondsLMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_TSBCoveredBondsHoldingsLtdAndTSBBankingGroupPlcEmployeeShareTrustMember" abstract="true" name="TSBCoveredBondsHoldingsLtdAndTSBBankingGroupPlcEmployeeShareTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_NumberOfSubsidiaries" abstract="false" name="NumberOfSubsidiaries" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NumberOfStructuredEntities" abstract="false" name="NumberOfStructuredEntities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_CoreDepositIntangiblesMember" abstract="true" name="CoreDepositIntangiblesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PurchasedCreditCardReceivablesPCCRMember" abstract="true" name="PurchasedCreditCardReceivablesPCCRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfDepositsFromBanksTable" abstract="true" name="DisclosureOfDepositsFromBanksTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_ItemsInCourseOfTransmissionMember" abstract="true" name="ItemsInCourseOfTransmissionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DepositsHeldAsCollateralMember" abstract="true" name="DepositsHeldAsCollateralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherDepositsMember" abstract="true" name="OtherDepositsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AmountsDueToSantanderUkSubsidiariesMember" abstract="true" name="AmountsDueToSantanderUkSubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfDepositsFromBanksLineItems" abstract="true" name="DisclosureOfDepositsFromBanksLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_DepositsFromBanksSettlementActivities" abstract="false" name="DepositsFromBanksSettlementActivities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DrawdownFromTermFundingSchemeForSME" abstract="false" name="DrawdownFromTermFundingSchemeForSME" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CurrentAndDemandAccountsMember" abstract="true" name="CurrentAndDemandAccountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AmountsDueToOtherSantanderUkGroupHoldingsPlcSubsidiariesMember" abstract="true" name="AmountsDueToOtherSantanderUkGroupHoldingsPlcSubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AmountsDueToSantanderUKGroupHoldingsPlcMember" abstract="true" name="AmountsDueToSantanderUKGroupHoldingsPlcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AmountsDueToFellowBancoSantanderSubsidiariesAndJointVenturesMember" abstract="true" name="AmountsDueToFellowBancoSantanderSubsidiariesAndJointVenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_EquityIndexLinkedDepositsMember" abstract="true" name="EquityIndexLinkedDepositsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CapitalAmountGuaranteedOrProtectedInRespectOfEquityIndexLinkedDeposits" abstract="false" name="CapitalAmountGuaranteedOrProtectedInRespectOfEquityIndexLinkedDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfRepurchaseAgreementsTable" abstract="true" name="DisclosureOfRepurchaseAgreementsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_DisclosureOfRepurchaseAgreementsLineItems" abstract="true" name="DisclosureOfRepurchaseAgreementsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossTable" abstract="true" name="DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_StructuredNotesProgrammesMember" abstract="true" name="StructuredNotesProgrammesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_StructuredDepositsMember" abstract="true" name="StructuredDepositsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ZeroAmortisingGuaranteedNotesMember" abstract="true" name="ZeroAmortisingGuaranteedNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossLineItems" abstract="true" name="DisclosureOfOtherFinancialLiabilitiesAtFairValueThroughProfitOrLossLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_DebtSecuritiesInIssueTable" abstract="true" name="DebtSecuritiesInIssueTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_MediumTermNotesMember" abstract="true" name="MediumTermNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DownstreamedFromSantanderUKGroupHoldingsPlcToSantanderUKPLCMember" abstract="true" name="DownstreamedFromSantanderUKGroupHoldingsPlcToSantanderUKPLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_USDollarTwentyBillionCommercialPaperProgrammesMember" abstract="true" name="USDollarTwentyBillionCommercialPaperProgrammesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CertificateOfDepositMember" abstract="true" name="CertificateOfDepositMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CreditLinkedNotesMember" abstract="true" name="CreditLinkedNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DebtSecuritiesInIssueLineItems" abstract="true" name="DebtSecuritiesInIssueLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_CreditLinkedNotesIssued" abstract="false" name="CreditLinkedNotesIssued" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CustomerRemediationMotorMember" abstract="true" name="CustomerRemediationMotorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PropertyMember" abstract="true" name="PropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherRestructuringAndSpecificProvisionsMember" abstract="true" name="OtherRestructuringAndSpecificProvisionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ECLOnUndrawnFacilitiesAndGuaranteesMember" abstract="true" name="ECLOnUndrawnFacilitiesAndGuaranteesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RegulatoryLeviesAndFeesMember" abstract="true" name="RegulatoryLeviesAndFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_BankLevyMember" abstract="true" name="BankLevyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CustomerRemediationOtherMember" abstract="true" name="CustomerRemediationOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherFraudAndOperationalLossesMember" abstract="true" name="OtherFraudAndOperationalLossesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OperationalRiskProvisionsMember" abstract="true" name="OperationalRiskProvisionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FraudLossMember" abstract="true" name="FraudLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_BankOfEnglandMember" abstract="true" name="BankOfEnglandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RestructuringProjectAxis" abstract="true" name="RestructuringProjectAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_RestructuringProjectDomain" abstract="true" name="RestructuringProjectDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_BranchTransformationProjectMember" abstract="true" name="BranchTransformationProjectMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_TypesOfBranchesAxis" abstract="true" name="TypesOfBranchesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_TypesOfBranchesDomain" abstract="true" name="TypesOfBranchesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FullServiceBranchesMember" abstract="true" name="FullServiceBranchesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CounterFreeBranchesMember" abstract="true" name="CounterFreeBranchesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ReducedHoursBranchesMember" abstract="true" name="ReducedHoursBranchesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ProvisionSubCategoryAxis" abstract="true" name="ProvisionSubCategoryAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_ProvisionSubCategoryDomain" abstract="true" name="ProvisionSubCategoryDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RedundancyProvisionMember" abstract="true" name="RedundancyProvisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PropertyProvisionsMember" abstract="true" name="PropertyProvisionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ImpairmentOfPropertyMember" abstract="true" name="ImpairmentOfPropertyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_NumberOfBranchClosures" abstract="false" name="NumberOfBranchClosures" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NumberOfBranches" abstract="false" name="NumberOfBranches" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NumberOfWorkCafesWithSupportProvided" abstract="false" name="NumberOfWorkCafesWithSupportProvided" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NumberOfSantanderLocals" abstract="false" name="NumberOfSantanderLocals" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_NumberOfEmployeesAtRiskForRedundancy" abstract="false" name="NumberOfEmployeesAtRiskForRedundancy" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="san_SurplusMember" abstract="true" name="SurplusMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_UnfundedPensionAndPostRetirementMedicalBenefitsMember" abstract="true" name="UnfundedPensionAndPostRetirementMedicalBenefitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PercentageOfDefinedBenefitObligationInsured" abstract="false" name="PercentageOfDefinedBenefitObligationInsured" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="san_LongevityAtSixtyForCurrentPensionersOnValuationDateAbstract" abstract="true" name="LongevityAtSixtyForCurrentPensionersOnValuationDateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_LongevityForCurrentPensionersMalesOne" abstract="false" name="LongevityForCurrentPensionersMalesOne" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="san_LongevityForCurrentPensionersFemalesOne" abstract="false" name="LongevityForCurrentPensionersFemalesOne" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="san_LongevityAtSixtyForFuturePensionersCurrentlyAgedFortyOnValuationDateAbstract" abstract="true" name="LongevityAtSixtyForFuturePensionersCurrentlyAgedFortyOnValuationDateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_LongevityForFuturePensionersMalesOne" abstract="false" name="LongevityForFuturePensionersMalesOne" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="san_LongevityForFuturePensionersFemalesOne" abstract="false" name="LongevityForFuturePensionersFemalesOne" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="san_SterlingPreferenceSharesNotionalAmount" abstract="false" name="SterlingPreferenceSharesNotionalAmount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_GainLossOnRepurchaseOfSubordinatedLiabilities" abstract="false" name="GainLossOnRepurchaseOfSubordinatedLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DisclosureOfContingentLiabilitiesAndCommitmentsLineItems" abstract="true" name="DisclosureOfContingentLiabilitiesAndCommitmentsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_GuaranteesGivenToThirdParties" abstract="false" name="GuaranteesGivenToThirdParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_StandbyFacilitiesCreditLinesAndOtherCommitments" abstract="false" name="StandbyFacilitiesCreditLinesAndOtherCommitments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_EstimatedFinancialEffectOfContingentLiabilitiesAndCommitments" abstract="false" name="EstimatedFinancialEffectOfContingentLiabilitiesAndCommitments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_InterestRefundCustomerRemediationMember" abstract="true" name="InterestRefundCustomerRemediationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_LitigationAndOtherRegulatoryMember" abstract="true" name="LitigationAndOtherRegulatoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_AXAFranceMember" abstract="true" name="AXAFranceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_UKIBanksMember" abstract="true" name="UKIBanksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_UKIrelandMultilateralInterchangeFeesMember" abstract="true" name="UKIrelandMultilateralInterchangeFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_LitigationSettlementMaximumPotentialExposure" abstract="false" name="LitigationSettlementMaximumPotentialExposure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_PreferredStockIssuedThreshold" abstract="false" name="PreferredStockIssuedThreshold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_SantanderUKLiabilityUnderIndemnityCap" abstract="false" name="SantanderUKLiabilityUnderIndemnityCap" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_TwoHundredAndTenMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" abstract="true" name="TwoHundredAndTenMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SevenHundredAndFiftyMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" abstract="true" name="SevenHundredAndFiftyMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FourHundredMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" abstract="true" name="FourHundredMillionFixedRateResetPerpetualATOneCapitalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FiveHundredMillionFixedRateResetPerpetualAtOneCapitalSecuritiesThreeMember" abstract="true" name="FiveHundredMillionFixedRateResetPerpetualAtOneCapitalSecuritiesThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FourHundredAndTenMillionPerpetualCapitalSecuritiesMember" abstract="true" name="FourHundredAndTenMillionPerpetualCapitalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CapitalSecuritiesIssued" abstract="false" name="CapitalSecuritiesIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_PercentageOnOtherEquityInterest" abstract="false" name="PercentageOnOtherEquityInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="san_DisclosureOfAssetsPledgedAsSecurityTable" abstract="true" name="DisclosureOfAssetsPledgedAsSecurityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="san_InternallyRetainedMember" abstract="true" name="InternallyRetainedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ThirdPartyBilateralSecuredFundingTransactionsMember" abstract="true" name="ThirdPartyBilateralSecuredFundingTransactionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SecuritisationAndCoveredBondsMember" abstract="true" name="SecuritisationAndCoveredBondsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SantanderUkPlcMember" abstract="true" name="SantanderUkPlcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfAssetsPledgedAsSecurityLineItems" abstract="true" name="DisclosureOfAssetsPledgedAsSecurityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_NoteIssuancesAvailableForCreatingCollateral" abstract="false" name="NoteIssuancesAvailableForCreatingCollateral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseInAssetsRecognisedInEntitysFinancialStatementsInRelationToStructuredEntities" abstract="false" name="IncreaseInAssetsRecognisedInEntitysFinancialStatementsInRelationToStructuredEntities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IncreaseInNoteIssuancesAvailableForCreatingCollateral" abstract="false" name="IncreaseInNoteIssuancesAvailableForCreatingCollateral" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="san_ReverseRepurchaseAgreementsNonTradingMember" abstract="true" name="ReverseRepurchaseAgreementsNonTradingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="san_DepositsByCustomersMember" abstract="true" name="DepositsByCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="san_RepurchaseAgreementsNonTradingMember" abstract="true" name="RepurchaseAgreementsNonTradingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DebtSecuritiesInIssueMember" abstract="true" name="DebtSecuritiesInIssueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SubordinatedLiabilitiesMember" abstract="true" name="SubordinatedLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfFairValuesOfFinancialInstrumentsCarriedAtAmortisedCostLineItems" abstract="true" name="DisclosureOfFairValuesOfFinancialInstrumentsCarriedAtAmortisedCostLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_ExchangeRateContractsMember" abstract="true" name="ExchangeRateContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_NettingContractsMember" abstract="true" name="NettingContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DebtSecuritiesAndOtherDebtInstrumentsMember" abstract="true" name="DebtSecuritiesAndOtherDebtInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CollateralsAndGuaranteesMember" abstract="true" name="CollateralsAndGuaranteesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="san_OtherFinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" abstract="true" name="OtherFinancialAssetsAtFairValueThroughProfitOrLossCategoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_OtherFinancialLiabilitiesAtFairValueThroughProfitOrLossMember" abstract="true" name="OtherFinancialLiabilitiesAtFairValueThroughProfitOrLossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_DisclosureOfFairValueMeasurementsOfAssetsAndLiabilitiesLineItems" abstract="true" name="DisclosureOfFairValueMeasurementsOfAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_FairValuesOfFinancialInstrumentsValuationTechniqueUsed" abstract="false" name="FairValuesOfFinancialInstrumentsValuationTechniqueUsed" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="san_FairValueAdjustmentsAxis" abstract="true" name="FairValueAdjustmentsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
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  <xs:element id="san_BidOfferAndTradeSpecificRiskRelatedAdjustmentsMember" abstract="true" name="BidOfferAndTradeSpecificRiskRelatedAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RiskRelatedUncertaintyAdjustmentsMember" abstract="true" name="RiskRelatedUncertaintyAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CreditRiskAdjustmentsMember" abstract="true" name="CreditRiskAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_RiskRelatedFundingFairValueAdjustmentMember" abstract="true" name="RiskRelatedFundingFairValueAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FairValueAdjustmentsClassificationAxis" abstract="true" name="FairValueAdjustmentsClassificationAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_FairValueAdjustmentsClassificationDomain" abstract="true" name="FairValueAdjustmentsClassificationDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="san_FairValueAdjustments" abstract="false" name="FairValueAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_FinancialAssetsAbstract" abstract="true" name="FinancialAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="san_AdditionalTier1SecuritiesMember" abstract="true" name="AdditionalTier1SecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FixedToFloatingRateCallableSubordinatedTier2CapitalNotesMember" abstract="true" name="FixedToFloatingRateCallableSubordinatedTier2CapitalNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_SeniorUnsecuredDebtSecuritiesMember" abstract="true" name="SeniorUnsecuredDebtSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_BusinessCombinationFairValueMeasurementAxis" abstract="true" name="BusinessCombinationFairValueMeasurementAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="san_BusinessCombinationFairValueMeasurementDomain" abstract="true" name="BusinessCombinationFairValueMeasurementDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FairValueAdjustmentMember" abstract="true" name="FairValueAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_FundingSpreadMeasurementInputMember" abstract="true" name="FundingSpreadMeasurementInputMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_ConsiderationPaidReceivedTNAVVariation" abstract="false" name="ConsiderationPaidReceivedTNAVVariation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_RetailDepositFundingPercentage" abstract="false" name="RetailDepositFundingPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="san_WholesaleDebtFundingPercentage" abstract="false" name="WholesaleDebtFundingPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="san_SensitivityAnalysisForFairValueMeasurementReasonablyPossibleChange" abstract="false" name="SensitivityAnalysisForFairValueMeasurementReasonablyPossibleChange" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="san_PostAcquisitionIntegrationCostsRecognisedInOperatingExpenses" abstract="false" name="PostAcquisitionIntegrationCostsRecognisedInOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_PreAcquisitionIntegrationCostsRecognisedInOperatingExpenses" abstract="false" name="PreAcquisitionIntegrationCostsRecognisedInOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_ProfitLossBeforeTaxOfAcquireeSinceAcquisitionDate" abstract="false" name="ProfitLossBeforeTaxOfAcquireeSinceAcquisitionDate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DerivativeFinancialInstrumentRecognisedAsOfAcquisitionDate" abstract="false" name="DerivativeFinancialInstrumentRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_LoansAndAdvancesToBanksRecognisedAsOfAcquisitionDate" abstract="false" name="LoansAndAdvancesToBanksRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_LoansAndAdvancesToCustomersRecognisedAsOfAcquisitionDate" abstract="false" name="LoansAndAdvancesToCustomersRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OtherFinancialAssetsAtAmortisedCostRecognisedAsOfAcquisitionDate" abstract="false" name="OtherFinancialAssetsAtAmortisedCostRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_PortfolioHedgesOfInterestRateRiskAdjustmentToHedgedAssetsRecognisedAsOfAcquisitionDate" abstract="false" name="PortfolioHedgesOfInterestRateRiskAdjustmentToHedgedAssetsRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeRecognisedAsOfAcquisitionDate" abstract="false" name="FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OtherAssetsRecognisedAsOfAcquisitionDate" abstract="false" name="OtherAssetsRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IdentifiableAssetsAcquiredRecognisedAsOfAcquisitionDate" abstract="false" name="IdentifiableAssetsAcquiredRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DepositsFromBanksRecognisedAsOfAcquisitionDate" abstract="false" name="DepositsFromBanksRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DepositsFromCustomersRecognisedAsOfAcquisitionDate" abstract="false" name="DepositsFromCustomersRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DerivativeFinancialLiabilitiesRecognisedAsOfAcquisitionDate" abstract="false" name="DerivativeFinancialLiabilitiesRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DebtSecuritiesRecognisedAsOfAcquisitionDate" abstract="false" name="DebtSecuritiesRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_PortfolioHedgesOfInterestRateRiskAdjustmentToHedgedLiabilitiesRecognisedAsOfAcquisitionDate" abstract="false" name="PortfolioHedgesOfInterestRateRiskAdjustmentToHedgedLiabilitiesRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_OtherLiabilitiesRecognisedAsOfAcquisitionDate" abstract="false" name="OtherLiabilitiesRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_ProvisionsRecognisedAsOfAcquisitionDate" abstract="false" name="ProvisionsRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_SubordinatedLiabilitiesRecognisedAsOfAcquisitionDate" abstract="false" name="SubordinatedLiabilitiesRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_IdentifiableLiabilitiesAcquiredRecognisedAsOfAcquisitionDate" abstract="false" name="IdentifiableLiabilitiesAcquiredRecognisedAsOfAcquisitionDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_BusinessCombinationConsiderationTransferredAT1SecuritiesAndOther" abstract="false" name="BusinessCombinationConsiderationTransferredAT1SecuritiesAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_MortgageFairValueImpactMember" abstract="true" name="MortgageFairValueImpactMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CDIImpactMember" abstract="true" name="CDIImpactMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_PurchasePriceAllocationImpactMember" abstract="true" name="PurchasePriceAllocationImpactMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="san_CashCashBalancesAtCentralBanksAndOtherDemandDepositsOnAcquisition" abstract="false" name="CashCashBalancesAtCentralBanksAndOtherDemandDepositsOnAcquisition" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_AdjustmentsForItemsNotClassifiedAsCashAndCashEquivalents" abstract="false" name="AdjustmentsForItemsNotClassifiedAsCashAndCashEquivalents" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CashPaidForOrdinaryShares" abstract="false" name="CashPaidForOrdinaryShares" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CashPaidForAT1Securities" abstract="false" name="CashPaidForAT1Securities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_CashPaidForDebtSecurities" abstract="false" name="CashPaidForDebtSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_NetCashFlowFromAcquisition" abstract="false" name="NetCashFlowFromAcquisition" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="san_DividendPaidMember" abstract="true" name="DividendPaidMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
