v3.25.4
Fair value of financial instruments - Disclosure of Level 3 assets and liabilities held at fair value disaggregated by product type (Details) - GBP (£)
£ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets £ 189,743 £ 166,244
Total financial assets at fair value through the income statement 185,002 191,845
Derivative financial instruments 252,192 292,356
Financial assets at fair value through other comprehensive income 42,818 51,010
Trading Portfolio Liabilities (56,829) (56,182)
Financial liabilities designated at fair value (293,527) (279,777)
Derivative financial liabilities (240,757) (279,331)
Level 3    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 10,347 10,115
Total financial assets at fair value through the income statement 6,186 5,991
Derivative financial instruments 1,710 2,073
Financial assets at fair value through other comprehensive income 3,068 3,674
Investment property 43 9
Total assets 21,354 21,862
Trading Portfolio Liabilities (87) (395)
Financial liabilities designated at fair value (4,853) (3,241)
Derivative financial liabilities (3,065) (3,181)
Total liabilities (8,005) (6,817)
Level 3 | Interest rate derivatives    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial instruments 759 1,193
Total assets 759 1,193
Derivative financial liabilities (612) (1,013)
Total liabilities (612) (1,013)
Level 3 | Equity derivatives    
Disclosure of detailed information about financial instruments [line items]    
Derivative financial instruments 520 477
Total assets 520 477
Derivative financial liabilities (1,602) (1,219)
Total liabilities (1,602) (1,219)
Level 3 | Loans    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 5,667 6,146
Total financial assets at fair value through the income statement 4,620 3,991
Financial assets at fair value through other comprehensive income 2,235 2,858
Total assets 12,522 12,995
Level 3 | Corporate debt    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 1,849 1,590
Total financial assets at fair value through the income statement 905 913
Financial assets at fair value through other comprehensive income 25 47
Total assets 2,779 2,550
Trading Portfolio Liabilities (36) (374)
Total liabilities (36) (374)
Level 3 | Asset backed securities    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 874 991
Total financial assets at fair value through the income statement 188 139
Financial assets at fair value through other comprehensive income 756 757
Total assets 1,818 1,887
Trading Portfolio Liabilities   (6)
Total liabilities   (6)
Level 3 | Government and Government sponsored debt    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 1,513 1,018
Total financial assets at fair value through the income statement 33 35
Financial assets at fair value through other comprehensive income 52 12
Total assets 1,598 1,065
Trading Portfolio Liabilities (34)  
Total liabilities (34)  
Level 3 | Private equity investments    
Disclosure of detailed information about financial instruments [line items]    
Total financial assets at fair value through the income statement 268 219
Total assets 268 219
Level 3 | Issued debt    
Disclosure of detailed information about financial instruments [line items]    
Financial liabilities designated at fair value (3,760) (1,842)
Total liabilities (3,760) (1,842)
Level 3 | Reverse repurchase and repurchase agreements    
Disclosure of detailed information about financial instruments [line items]    
Total financial assets at fair value through the income statement 97 539
Total assets 97 539
Financial liabilities designated at fair value (887) (1,379)
Total liabilities (887) (1,379)
Level 3 | Other products    
Disclosure of detailed information about financial instruments [line items]    
Trading portfolio assets 444 370
Total financial assets at fair value through the income statement 75 155
Derivative financial instruments 431 403
Investment property 43 9
Total assets 993 937
Trading Portfolio Liabilities (17) (15)
Financial liabilities designated at fair value (206) (20)
Derivative financial liabilities (851) (949)
Total liabilities £ (1,074) £ (984)