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Memorandum items - Contingent liabilities and commitments (Details) - GBP (£) £ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Contingent liabilities and commitments |  |  |
Standby facilities, credit lines and other commitments | £ 121,576 | £ 121,308 |
Contingent liabilities and commitments | 126,581 | 125,367 | £ 128,732
Guarantees |  |  |
Contingent liabilities and commitments |  |  |
Estimated net exposure | 3,150 | 2,055 |
Other contingent liabilities |  |  |
Contingent liabilities and commitments |  |  |
Estimated net exposure | £ 1,855 | £ 2,004 |

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