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Deferred income tax - Major components of deferred tax assets and liabilities at the year end and their changes (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Deferred income tax |  |  |
At 1 January | £ 66 | £ 57 |
Exchange differences | (27) | (2) |
Recognised in income statement | (14) | 8 | £ (23)
Recognised in other comprehensive income | (5) |  |
Recognised in equity | 2 | (5) |
Acquired in business combinations | 446 | 8 |
At 31 December | 468 | 66 | 57
Customer lists / intangibles |  |  |
Deferred income tax |  |  |
At 1 January | 84 | 76 |
Exchange differences | (32) |  |
Recognised in income statement | (1) | 1 |
Acquired in business combinations | 519 | 7 |
At 31 December | 570 | 84 | 76
Accelerated tax depreciation |  |  |
Deferred income tax |  |  |
At 1 January | 50 | 44 |
Exchange differences |  | (1) |
Recognised in income statement | (4) | 7 |
Acquired in business combinations | 29 |  |
At 31 December | 75 | 50 | 44
Provisions |  |  |
Deferred income tax |  |  |
At 1 January | (52) | (45) |
Exchange differences | 8 | (1) |
Recognised in income statement | (4) | (7) |
Acquired in business combinations | (123) | 1 |
At 31 December | (171) | (52) | (45)
IFRS 15 Contracts |  |  |
Deferred income tax |  |  |
At 1 January | 9 | 8 |
Exchange differences | (2) |  |
Recognised in income statement | 2 | 1 |
Acquired in business combinations | 24 |  |
At 31 December | 33 | 9 | 8
Tax losses |  |  |
Deferred income tax |  |  |
At 1 January | (14) | (18) |
Recognised in income statement | (2) | 4 |
Recognised in other comprehensive income | (4) |  |
Acquired in business combinations | (3) |  |
At 31 December | (23) | (14) | (18)
Share-based payments |  |  |
Deferred income tax |  |  |
At 1 January | (15) | (9) |
Recognised in income statement | (3) | (1) |
Recognised in equity | 2 | (5) |
At 31 December | (16) | (15) | (9)
Other |  |  |
Deferred income tax |  |  |
At 1 January | 4 | 1 |
Exchange differences | (1) |  |
Recognised in income statement | (2) | 3 |
Recognised in other comprehensive income | £ (1) |  |
At 31 December |  | £ 4 | £ 1

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph g -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of deferred tax related to items credited (charged) directly to equity. [Refer: Deferred tax expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from business combinations. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Deferred income tax relating to components of other comprehensive income + References No definition available. + Details
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