v3.26.1
Fair values of financial assets and liabilities- Schedule of Movements in Level 3 Financial Assets Portfolio (Details) - Level 3 £m - GBP (£)
£ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Reconciliation of changes in fair value measurement, assets [abstract]    
Balance at beginning of period £ 337 £ 328
Exchange and other adjustments (1) 2
(Losses) gains recognised in the income statement within other income (5) (14)
Losses recognised in other comprehensive income within the revaluation reserve in respect of financial assets at FVOCI   (1)
Purchases/increases 9 14
Sales/repayments (42) (20)
Balance at end of period 298 309
Financial assets at fair value through profit or loss    
Reconciliation of changes in fair value measurement, assets [abstract]    
Balance at beginning of period 287 280
Exchange and other adjustments 0 0
(Losses) gains recognised in the income statement within other income (6) (16)
Losses recognised in other comprehensive income within the revaluation reserve in respect of financial assets at FVOCI   0
Purchases/increases 9 14
Sales/repayments (41) (18)
Balance at end of period 249 260
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those assets held (4) (16)
Financial assets at fair value through other comprehensive income    
Reconciliation of changes in fair value measurement, assets [abstract]    
Balance at beginning of period 50 48
Exchange and other adjustments (1) 2
(Losses) gains recognised in the income statement within other income 1 2
Losses recognised in other comprehensive income within the revaluation reserve in respect of financial assets at FVOCI   (1)
Purchases/increases 0 0
Sales/repayments (1) (2)
Balance at end of period 49 49
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those assets held 1 3
Total financial assets carried at fair value £m    
Reconciliation of changes in fair value measurement, assets [abstract]    
(Losses) gains recognised in the income statement, within other income, relating to the change in fair value of those assets held £ (3) £ (13)