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Income tax expense (Details) - GBP (£) £ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of geographical areas |  |  |  |  |
Adjustment in respect of previous periods |  |  | £ 2 | £ (3) | £ (3)
Total current tax |  |  | 78 | 54 | 67
Deferred tax (credit)/expense |  |  | (3) | 21 | (17)
Deferred tax adjustment in respect of previous periods |  |  | (11) | (13) | (6)
Total deferred tax |  |  | (14) | 8 | (23)
Total income tax expense | [1] |  | 64 | 62 | 44
UK |  |  |  |  |
Disclosure of geographical areas |  |  |  |  |
Taxation |  |  | £ 17 | £ 9 | £ 9
UK corporation tax rate |  | 25.00% | 19.00% | 19.00% | 19.00%
Overseas countries |  |  |  |  |
Disclosure of geographical areas |  |  |  |  |
Taxation |  |  | £ 59 | £ 48 | £ 61
Total income tax expense |  |  | £ 58 | £ 50 | £ 40
[1] | Taxation includes £58m (2021: £50m; 2020: £40m) in respect of overseas taxation.

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