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Financial instruments: valuation - Level 3 Sensitivities of Liabilities (Details) - GBP (£) £ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Fair value of liabilities |  |  |
Liabilities | £ 167,807 | £ 236,157 |
Derivatives [Member] |  |  |
Fair value of liabilities |  |  |
Liabilities | 100,835 | 160,705 |
Other financial liabilities - Debt securities in issue |  |  |
Fair value of liabilities |  |  |
Liabilities | 1,103 | 1,607 |
Level 3 |  |  |
Fair value of liabilities |  |  |
Liabilities | 609 | 894 |
Sensitivity favourable | (30) | 50 |
Sensitivity unfavourable | 30 | 40 |
Level 3 | Deposits |  |  |
Fair value of liabilities |  |  |
Liabilities | 2 | 7 |
Level 3 | Short Positions |  |  |
Fair value of liabilities |  |  |
Liabilities | 1 |  |
Level 3 | Derivatives [Member] |  |  |
Fair value of liabilities |  |  |
Liabilities | 606 | 887 |
Sensitivity favourable | (30) | 50 |
Sensitivity unfavourable | 30 | 40 |
Recurring | Level 3 |  |  |
Fair value of liabilities |  |  |
Liabilities | £ 609 | £ 894 | £ 1,317

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