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Share capital and other equity - Non-cumulative preference shares (Details) - GBP (£) £ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Share capital and other equity |  |  |  |  |
Value of shares | £ 37,188 | £ 36,496 | £ 41,803 | [1] | £ 43,824
[1] | In 2021, the Total equity balance of £41,803 million includes £494 million attributable to Preference shareholders.

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