v3.25.4
Tax - Disclosure of movements on deferred tax assets and liabilities during the year before offsetting (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance £ 5,278 £ 5,103  
Liabilities, beginning balance (1,147) (1,218)  
Assets (liabilities), beginning balance 4,131 3,885  
Income statement (312) (277) £ (153)
Other comprehensive income and reserves (758) 528  
Other movements (126) (5)  
Assets, ending balance 3,971 5,278 5,103
Liabilities, ending balance (1,036) (1,147) (1,218)
Assets (liabilities), ending balance 2,935 4,131 3,885
Share based payments and deferred compensation      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 409 327  
Liabilities, beginning balance 0 0  
Assets (liabilities), beginning balance 409 327  
Income statement 40 (6)  
Other comprehensive income and reserves 114 79  
Other movements (16) 9  
Assets, ending balance 547 409 327
Liabilities, ending balance 0 0 0
Assets (liabilities), ending balance 547 409 327
Retirement benefit obligations      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 12 16  
Liabilities, beginning balance (897) (1,014)  
Assets (liabilities), beginning balance (885) (998)  
Income statement 14 (3)  
Other comprehensive income and reserves (7) 116  
Other movements (2) 0  
Assets, ending balance 14 12 16
Liabilities, ending balance (894) (897) (1,014)
Assets (liabilities), ending balance (880) (885) (998)
Cash flow hedges      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 904 1,058  
Liabilities, beginning balance (3) 0  
Assets (liabilities), beginning balance 901 1,058  
Income statement 0 0  
Other comprehensive income and reserves (582) (157)  
Other movements 0 0  
Assets, ending balance 319 904 1,058
Liabilities, ending balance 0 (3) 0
Assets (liabilities), ending balance 319 901 1,058
Fair value through other comprehensive income      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 691 510  
Liabilities, beginning balance 0 0  
Assets (liabilities), beginning balance 691 510  
Income statement 0 0  
Other comprehensive income and reserves (256) 181  
Other movements 0  
Assets, ending balance 435 691 510
Liabilities, ending balance 0 0 0
Assets (liabilities), ending balance 435 691 510
Fixed asset timing differences      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 367 275  
Liabilities, beginning balance (109) (112)  
Assets (liabilities), beginning balance 258 163  
Income statement 42 90  
Other comprehensive income and reserves 0 0  
Other movements (14) 5  
Assets, ending balance 380 367 275
Liabilities, ending balance (94) (109) (112)
Assets (liabilities), ending balance 286 258 163
Loan impairment allowance      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 408 506  
Liabilities, beginning balance 0 0  
Assets (liabilities), beginning balance 408 506  
Income statement (151) (79)  
Other comprehensive income and reserves 0 0  
Other movements (32) (19)  
Assets, ending balance 225 408 506
Liabilities, ending balance 0 0 0
Assets (liabilities), ending balance 225 408 506
Own credit      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 394 85  
Liabilities, beginning balance 0 0  
Assets (liabilities), beginning balance 394 85  
Income statement 0 1  
Other comprehensive income and reserves (28) 308  
Other movements 1 0  
Assets, ending balance 367 394 85
Liabilities, ending balance 0 0 0
Assets (liabilities), ending balance 367 394 85
Other temporary differences      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 878 903  
Liabilities, beginning balance (138) (92)  
Assets (liabilities), beginning balance 740 811  
Income statement 25 (72)  
Other comprehensive income and reserves 1 1  
Other movements (42) 0  
Assets, ending balance 772 878 903
Liabilities, ending balance (48) (138) (92)
Assets (liabilities), ending balance 724 740 811
Tax losses carried forward      
Reconciliation of changes in deferred tax liability (asset) [abstract]      
Assets, beginning balance 1,215 1,423  
Liabilities, beginning balance 0 0  
Assets (liabilities), beginning balance 1,215 1,423  
Income statement (282) (208)  
Other comprehensive income and reserves 0 0  
Other movements (21) 0  
Assets, ending balance 912 1,215 1,423
Liabilities, ending balance 0 0 0
Assets (liabilities), ending balance £ 912 £ 1,215 £ 1,423