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Share capital and other equity - Non-cumulative preference shares (Details) $ / shares in Units, £ in Millions | Mar. 31, 2022 $ / shares | Dec. 31, 2022 GBP (£) | Mar. 30, 2022 USD ($) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 GBP (£)
--- | --- | --- | --- | --- | ---
Share capital |  |  |  |  |
Value of shares | £ |  | £ 36,496 |  | £ 41,803 | £ 43,824
Series U Dollar Non-cumulative Preference Shares |  |  |  |  |
Share capital |  |  |  |  |
Value of shares | $ |  |  | $ 1,013,000,000 |  |
Redemption price per share | $ 100,000 |  |  |  |
Accrued dividends per share | $ 635.94 |  |  |  |

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