Leases - Lease payments (Details) - GBP (£) £ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases
Future minimum payments	£ 503	£ 231
Effect of discounting	(36)	(14)
Total	467	217	£ 215
Less than one year
Leases
Future minimum payments	144	80
Between one and five years
Leases
Future minimum payments	277	138
More than five years
Leases
Future minimum payments	£ 82	£ 13

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_LeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant