Events after the balance sheet date - Additional Informations (Detail) £ in Millions	Feb. 29, 2024 GBP (£)
Extension Of The Share Buy Back Programmer [Member]
Disclosure of non-adjusting events after reporting period [line items]
Shares authorised for repurchase amount	£ 200

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration