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Income tax expense - Additional Information (Details) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income taxes |  |  |
Effective tax rate | 24.20% | 22.70% | 21.60%
Blended tax rate | 25.30% | 25.10% | 23.70%
Deferred tax recognised on losses | £ 9 | £ 3 | £ 1
Credited/(charged) to other comprehensive income | £ (6) | £ 6 | £ 11
Most of jurisdictions in which group operates | Minimum |  |  |
Income taxes |  |  |
Effective tax rate | 15.00% |  |
Limited number of jurisdictions in which group operates |  |  |
Income taxes |  |  |
Effective tax rate | 15.00% |  |
Limited number of jurisdictions in which group operates | Maximum |  |  |
Income taxes |  |  |
Pillar Two top-up tax charge | £ 1 |  |

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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of current tax expense (income) related to Pillar Two income taxes. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 88B -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_88B&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to tax losses. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2024-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Current income tax relating to components of other comprehensive income + References No definition available. + Details
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