Unaudited condensed consolidated interim statement of changes in equity (Parenthetical) - GBP (£) £ in Millions	Jun. 30, 2026	Dec. 31, 2025
Statement of changes in equity [abstract]
Reserve of gains and losses on hedging instruments that hedge investments in equity instruments	£ 394	£ 408

A component of equity representing the accumulated gains and losses on hedging instruments that hedge investments in equity instruments that the entity has designated at fair value through other comprehensive income.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 78
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_e&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstruments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant