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Financial instruments: valuation - Level 3 Sensitivities of Assets (Details) - GBP (£) £ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Fair value of assets |  |  |
Assets | £ 202,880 | £ 280,855 |
Trading securities [Member] |  |  |
Fair value of assets |  |  |
Assets | 24,955 | 29,215 |
Derivatives [Member] |  |  |
Fair value of assets |  |  |
Assets | 106,139 | 166,523 |
Other loans |  |  |
Fair value of assets |  |  |
Assets | 566 | 353 |
Securities |  |  |
Fair value of assets |  |  |
Assets | 37,017 | 44,989 |
Level 3 |  |  |
Fair value of assets |  |  |
Assets | 2,052 | 1,723 |
Sensitivity favourable | 100 | 140 |
Sensitivity unfavourable | (110) | (110) |
Level 3 | Loans |  |  |
Fair value of assets |  |  |
Assets | 721 | 225 |
Sensitivity favourable | 10 | 10 |
Sensitivity unfavourable | (10) |  |
Level 3 | Trading securities [Member] |  |  |
Fair value of assets |  |  |
Assets | 21 | 81 |
Level 3 | Derivatives [Member] |  |  |
Fair value of assets |  |  |
Assets | 917 | 1,082 |
Sensitivity favourable | 60 | 80 |
Sensitivity unfavourable | (70) | (80) |
Level 3 | Other loans |  |  |
Fair value of assets |  |  |
Assets | 207 | 168 |
Sensitivity favourable | 10 | 20 |
Sensitivity unfavourable | (10) | (10) |
Level 3 | Securities |  |  |
Fair value of assets |  |  |
Assets | 186 | 167 |
Sensitivity favourable | 20 | 30 |
Sensitivity unfavourable | (20) | (20) |
Recurring | Level 3 |  |  |
Fair value of assets |  |  |
Assets | £ 2,052 | £ 1,723 | £ 2,554

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