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Share-based payments (Details) £ in Millions	12 Months Ended
	Dec. 31, 2022 GBP (£) plan	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 GBP (£)
Share-based payments
Number of equity-settled share-based LTIPs operated | plan	1
Percentage of awards based on TSR	50.00%	50.00%	60.00%
Percentage of awards based on performance against certain strategic and financial measures over the vesting period	50.00%	50.00%	40.00%
Total net charges for equity-settled share-based payment plans | £	£ 9	£ 10	£ 6

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- References

No definition available.

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- Definition

The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 51
-Subparagraph a
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-URIDate 2022-03-24

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- Definition

Number of share-based arrangement plans operated by the entity.

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- Definition

Percentage of awards issuable based on performance against certain strategic and financial measures over the vesting period, under the share-based payment arrangement.

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No definition available.

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- Definition

Percentage of awards issuable based on total shareholder return (TSR), under the share-based payment arrangement.

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No definition available.

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