Other reserves (Details) - GBP (£) £ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ (5) | £ (179) |
| Currency translation reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | 2,748 | 2,534 |
| Fair value through other comprehensive income reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (934) | (1,014) |
| Cash flow hedging reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (1,365) | (907) |
| Own credit reserve | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | (652) | (990) |
| Other reserves | ||
| Disclosure of reserves within equity [line items] | ||
| Other reserves | £ 198 | £ 198 |