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Reconciliation of profit before taxation to headline operating profit (Tables)	6 Months Ended
	Jun. 30, 2025
Reconciliation of operating profit to headline operating profit [Abstract]
Summary of Reconciliation of Operating (Loss)/Profit to Headline Operating Profit	Property-related restructuring costs includes £5 million of property-related impairment charges (2024: £4 million).

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Reconciliation Of Operating Loss Profit To Headline Operating Profit

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Reconciliation of operating profit to headline operating profit

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