The gain (loss) recognised on designation of a financial instrument, or a proportion of it, as measured at fair value through profit or loss, because a credit derivative is used to manage the credit risk of that financial instrument. [Refer: Credit risk [member]; Derivatives [member]; Classes of financial instruments [domain]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24G
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24G_b&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_GainLossOnDesignationOfFinancialInstrumentAsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRisk
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Finance expense - Additional Information (Detail) - GBP (£) £ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Disclosure of instruments with potential future dilutive effect not included in calculation of diluted earnings per share [line items]
Losses on warrant remeasurement	£ 12,648	£ 0	£ 12,648	£ 0	£ 0
Series A and Series B Warrants [Member]
Disclosure of instruments with potential future dilutive effect not included in calculation of diluted earnings per share [line items]
Losses on warrant remeasurement			£ 12,600