Net investment (expense)/income (Details) - GBP (£) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of detailed information about financial instruments [line items] | |||
| Net gains from financial assets mandatorily at fair value | £ 161 | £ 219 | £ 133 |
| Net (losses)/gains from disposal of financial assets at fair value through other comprehensive income | (201) | 134 | 102 |
| Net losses from disposals of financial assets and liabilities measured at amortised cost | (6) | (225) | (9) |
| Dividend Income | 0 | 3 | 0 |
| Net losses on other investments | (26) | (62) | (114) |
| Net investment (expense)/income | £ (72) | 69 | £ 112 |
| Italian retail market portfolio | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Net losses from disposals of financial assets and liabilities measured at amortised cost | £ (220) | ||