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Analysis of changes in financing during the year - Share capital, share premium and paid-in equity (Details) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Equity at beginning of period | £ 37,188 | £ 36,496 | £ 41,803
Equity at end of period | 39,378 | 37,188 | 36,496
Share capital, share premium and paid-in equity |  |  |
Equity at beginning of period | 14,734 | 15,590 | 16,519
Issue of paid-in equity | 1,390 |  |
Net cash flows from financing activities | 1,390 |  |
Shares repurchased | (711) | (856) | (929)
Equity at end of period | £ 15,413 | £ 14,734 | £ 15,590

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- Definition The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 44B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44B_a&doctype=Standard -URIDate 2024-03-27 + Details
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