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Income tax expense (Details) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income tax expense      
Current tax expense £ 94 £ 76 £ 57
Adjustment in respect of previous periods (8) 2 (3)
Total current tax 86 78 54
Deferred tax expense/(credit) 30 (3) 21
Deferred tax adjustment in respect of previous periods (4) (11) (13)
Total deferred tax 26 (14) 8
Total income tax expense [1] £ 112 £ 64 £ 62
[1] Taxation includes £106m (2022: £58m; 2021: £50m) in respect of overseas taxation.