Subordinated liabilities - Subordinated liabilities (Details) - GBP (£) £ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Disclosure of detailed information about borrowings [line items] | ||
| Opening balance as at 1 January | £ 45,239 | £ 41,875 |
| Issuances | 4,465 | 9,808 |
| Redemptions | (6,239) | (5,665) |
| Other | (213) | (779) |
| Closing balance | 43,252 | 45,239 |
| Total subordinated liabilities | 43,857 | 45,826 |
| At fair value | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Opening balance as at 1 January | 587 | |
| Closing balance | £ 605 | £ 587 |