LESSEE DISCLOSURES (Details) - GBP (£) £ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Leases [Abstract]
At 1 January	£ 1,318	£ 1,500
Exchange and other adjustments	3	(9)
Additions	98	73
Disposals	(37)	(18)
Depreciation charge for the year	(226)	(228)
At 31 December	1,156	1,318
Payments of lease liabilities, classified as financing activities	£ 210	£ 256

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2022-03-24
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- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2022-03-24
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- Definition

The cash outflow for payment of lease liabilities, classified as financing activities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Adjustments For Exchange And Other Adjustments, Right-Of-Use Assets

+ References

No definition available.

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Disclosure Of Leases [Abstract]

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- Definition

Disposals Of Right-Of-Use Assets

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