v3.25.4
Structured entities - Carrying amount of interest held in unconsolidated structured entities (Details) - GBP (£)
£ in Millions
Dec. 31, 2025
Dec. 31, 2024
Collective investment vehicles and limited partnerships    
STRUCTURED ENTITIES (Details) - Narrative [Line Items]    
Maximum exposure to loss from interests in structured entities £ 45,991 £ 86,630
Securitisation vehicles    
STRUCTURED ENTITIES (Details) - Narrative [Line Items]    
Maximum exposure to loss from interests in structured entities 1,186 2,403
Interest rate derivatives provided to securitisation vehicles    
STRUCTURED ENTITIES (Details) - Narrative [Line Items]    
Maximum exposure to loss from interests in structured entities £ 5 £ 22