v3.25.4
Liquidity risk - Schedule of Maturities of Liabilities (Details) - GBP (£)
£ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks £ 5,779 £ 6,158  
Customer deposits 496,457 482,745  
Repurchase agreements at amortised cost 38,570 37,760  
Financial liabilities at fair value through profit or loss 27,909 27,611  
Debt securities in issue at amortised cost 78,271 70,834  
Liabilities arising from non-participating investment contracts 61,640 51,228  
Lease liabilities 1,026 1,261  
Subordinated liabilities 9,894 10,089 £ 10,253
Derivative financial instruments 16,132 21,676  
Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 5,812 6,266  
Customer deposits 498,131 483,760  
Repurchase agreements at amortised cost 39,502 38,859  
Financial liabilities at fair value through profit or loss 29,856 30,156  
Notes in circulation 2,118 2,121  
Debt securities in issue at amortised cost 86,655 75,187  
Liabilities arising from non-participating investment contracts 61,640 51,228  
Lease liabilities 1,132 1,369  
Subordinated liabilities 16,759 13,312  
Total non-derivative financial liabilities 741,605 702,258  
Derivative financial instruments 17,884 25,420  
Net settled derivative liabilities 10,430 12,594  
Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 261,262 262,319  
Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 253,808 249,493  
Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 7,454 12,826  
Up to 1 month £m | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 1,872 1,809  
Customer deposits 428,915 437,693  
Repurchase agreements at amortised cost 11,966 8,974  
Financial liabilities at fair value through profit or loss 13,140 15,208  
Notes in circulation 2,118 2,121  
Debt securities in issue at amortised cost 408 3,704  
Liabilities arising from non-participating investment contracts 61,640 51,228  
Lease liabilities 35 28  
Subordinated liabilities 24 26  
Total non-derivative financial liabilities 520,118 520,791  
Derivative financial instruments 9,620 13,211  
Net settled derivative liabilities 8,258 10,432  
Up to 1 month £m | Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 89,450 100,432  
Up to 1 month £m | Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 88,088 97,653  
Up to 1 month £m | Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 1,362 2,779  
1 to 3 months £m | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 421 673  
Customer deposits 23,351 14,873  
Repurchase agreements at amortised cost 9,750 5,169  
Financial liabilities at fair value through profit or loss 6,062 3,965  
Notes in circulation 0 0  
Debt securities in issue at amortised cost 9,959 10,367  
Liabilities arising from non-participating investment contracts 0 0  
Lease liabilities 59 65  
Subordinated liabilities 1,170 698  
Total non-derivative financial liabilities 50,772 35,810  
Derivative financial instruments 1,487 2,210  
Net settled derivative liabilities 35 92  
1 to 3 months £m | Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 66,862 61,356  
1 to 3 months £m | Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 65,410 59,238  
1 to 3 months £m | Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 1,452 2,118  
3 to 12 months £m | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 1,930 904  
Customer deposits 35,640 24,811  
Repurchase agreements at amortised cost 7,866 15,300  
Financial liabilities at fair value through profit or loss 2,953 1,803  
Notes in circulation 0 0  
Debt securities in issue at amortised cost 22,797 13,624  
Liabilities arising from non-participating investment contracts 0 0  
Lease liabilities 200 241  
Subordinated liabilities 990 1,676  
Total non-derivative financial liabilities 72,376 58,359  
Derivative financial instruments 933 2,021  
Net settled derivative liabilities 62 109  
3 to 12 months £m | Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 43,379 43,231  
3 to 12 months £m | Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 42,508 41,319  
3 to 12 months £m | Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 871 1,912  
1 to 5 years £m | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 1,579 2,775  
Customer deposits 9,722 6,127  
Repurchase agreements at amortised cost 6,773 9,416  
Financial liabilities at fair value through profit or loss 2,044 2,102  
Notes in circulation 0 0  
Debt securities in issue at amortised cost 40,064 38,973  
Liabilities arising from non-participating investment contracts 0 0  
Lease liabilities 446 574  
Subordinated liabilities 6,247 4,207  
Total non-derivative financial liabilities 66,875 64,174  
Derivative financial instruments 1,653 2,866  
Net settled derivative liabilities 291 404  
1 to 5 years £m | Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 40,311 34,795  
1 to 5 years £m | Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 38,949 32,333  
1 to 5 years £m | Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 1,362 2,462  
Over 5 years £m | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Deposits from banks 10 105  
Customer deposits 503 256  
Repurchase agreements at amortised cost 3,147 0  
Financial liabilities at fair value through profit or loss 5,657 7,078  
Notes in circulation 0 0  
Debt securities in issue at amortised cost 13,427 8,519  
Liabilities arising from non-participating investment contracts 0 0  
Lease liabilities 392 461  
Subordinated liabilities 8,328 6,705  
Total non-derivative financial liabilities 31,464 23,124  
Derivative financial instruments 4,191 5,112  
Net settled derivative liabilities 1,784 1,557  
Over 5 years £m | Gross settled derivatives – outflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 21,260 22,505  
Over 5 years £m | Gross settled derivatives – inflows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments 18,853 18,950  
Over 5 years £m | Gross settled derivatives – net flows | Undiscounted future cash flow basis      
FINANCIAL RISK MANAGEMENT (Details) - Schedule of Maturities of Liabilities [Line Items]      
Derivative financial instruments £ 2,407 £ 3,555