v3.26.1
Financial instruments - valuation - Liabilities at Amortised Cost (Details) - GBP (£)
£ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair value of liabilities    
Financial Liabilities £ 701,539 £ 671,940
Amortised cost    
Fair value of liabilities    
Financial Liabilities 585,932 560,658
Deposits by banks    
Fair value of liabilities    
Financial Liabilities 50,002 44,092
Deposits by banks | Amortised cost    
Fair value of liabilities    
Financial Liabilities 50,002 44,092
Customer deposits    
Fair value of liabilities    
Financial Liabilities 448,605 442,998
Customer deposits | Amortised cost    
Fair value of liabilities    
Financial Liabilities 448,605 442,998
Debt securities in issue | Amortised cost    
Fair value of liabilities    
Financial Liabilities 67,200 63,000
Financial liabilities, subordinated    
Fair value of liabilities    
Financial Liabilities 6,606 6,123
Financial liabilities, subordinated | Amortised cost    
Fair value of liabilities    
Financial Liabilities 6,376 5,886
Not measured at fair value in statement of financial position but for which fair value is disclosed | Deposits by banks | Amortised cost    
Fair value of liabilities    
Fair value, Financial Liabilities 50,000 44,100
Not measured at fair value in statement of financial position but for which fair value is disclosed | Customer deposits | Amortised cost    
Fair value of liabilities    
Fair value, Financial Liabilities 448,600 424,400
Not measured at fair value in statement of financial position but for which fair value is disclosed | Debt securities in issue | Amortised cost    
Fair value of liabilities    
Fair value, Financial Liabilities 67,700 63,600
Not measured at fair value in statement of financial position but for which fair value is disclosed | Financial liabilities, subordinated | Amortised cost    
Fair value of liabilities    
Fair value, Financial Liabilities £ 6,500 £ 6,100