v3.25.4
Ordinary shares, preference shares and other equity - Disclosure of called up share capital, allotted and fully paid (Details) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of equity instruments [Roll Forward]    
Beginning balance, equity £ 59,220 £ 60,504
Ending balance, equity 62,313 59,220
Ordinary share capital    
Reconciliation of equity instruments [Roll Forward]    
AT1 securities issuance   0
AT1 securities redemption 0 0
Preference share capital    
Reconciliation of equity instruments [Roll Forward]    
AT1 securities issuance   0
AT1 securities redemption 0 0
Share capital    
Reconciliation of equity instruments [Roll Forward]    
Beginning balance, equity 2,348 2,348
AT1 securities issuance 0 0
AT1 securities redemption 0 0
Ending balance, equity 2,346 2,348
Share capital | Ordinary share capital    
Reconciliation of equity instruments [Roll Forward]    
Beginning balance, equity 2,342 2,342
AT1 securities issuance 0  
Ending balance, equity 2,342 2,342
Share capital | Preference share capital    
Reconciliation of equity instruments [Roll Forward]    
Beginning balance, equity 6 6
AT1 securities issuance 0  
Ending balance, equity 4 6
Other equity instruments    
Reconciliation of equity instruments [Roll Forward]    
Beginning balance, equity [1] 9,604 10,765
AT1 securities issuance 2,770 970
AT1 securities redemption (1,928) (2,131)
Ending balance, equity [1] £ 10,446 £ 9,604
[1] For further details refer to Note 26.