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Dividends (Details) - GBP (£) £ / shares in Units, £ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Dividend |  |
Dividends paid | £ 122 | £ 139
Proposed dividend per share | £ 0.0515 | £ 0.0430
Proposed dividend | £ 130 | £ 80
2020 final dividend paid - 5.41p per share |  |
Dividend |  |
Dividends paid |  | £ 100
Dividends paid per share |  | £ 0.0541
2021 interim dividend paid - 2.09p per share |  |
Dividend |  |
Dividends paid |  | £ 39
Dividends paid per share |  | £ 0.0209
2021 final dividend paid - 4.30p per share |  |
Dividend |  |
Dividends paid | £ 80 |
Dividends paid per share | £ 0.0430 |
2022 interim dividend paid - 2.40p per share |  |
Dividend |  |
Dividends paid | £ 42 |
Dividends paid per share | £ 0.0240 |

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- Definition The cash outflow for dividends paid by the entity, classified as financing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 31 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_31&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of dividends paid per ordinary share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2022-03-24 -Paragraph 16A -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=34&code=ifrs-tx-2022-en-r&anchor=para_16A_f&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of dividends proposed or declared after the reporting period but before financial statements are authorised for issue. Such dividends are not recognised as a liability at the end of the reporting period because no obligation exists at that time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 10 -IssueDate 2022-03-24 -Paragraph 13 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=10&code=ifrs-tx-2022-en-r&anchor=para_13&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 137 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_137_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 137 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_137_a&doctype=Standard -URIDate 2022-03-24 + Details
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