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Leases - Summary of Movement in Right of use Assets and Lease Liabilities (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Leases [Line Items] |  |  |
Beginning balance, right-of-use assets | £ 1,382 | £ 1,528 |
Additions | 358 | 305 |
Transfers to net investment in subleases |  | (5) |
Disposals | (103) | (10) |
Depreciation of right-of-use assets | (213) | (257) | £ (262)
Impairment charges included within restructuring costs | (1) | (129) | (34)
Exchange adjustments | (38) | (50) |
Ending balance, right-of-use assets | 1,385 | 1,382 | 1,528
Lease liabilities, beginning balance | 2,154 | 2,210 |
Additions | 307 | 288 |
Interest expense related to lease liabilities | 98 | 106 | 96
Disposals | (126) | (13) |
Repayment of lease liabilities (including interest) | (377) | (362) |
Exchange adjustments | (36) | (75) |
Lease liabilities, ending balance | 2,020 | 2,154 | 2,210
Land and buildings |  |  |
Disclosure Of Leases [Line Items] |  |  |
Beginning balance, right-of-use assets | 1,309 | 1,482 |
Additions | 334 | 255 |
Transfers to net investment in subleases |  | (5) |
Disposals | (82) | (9) |
Depreciation of right-of-use assets | (197) | (236) | (245)
Impairment charges included within restructuring costs | (1) | (129) |
Exchange adjustments | (35) | (49) |
Ending balance, right-of-use assets | 1,328 | 1,309 | 1,482
Lease liabilities, beginning balance | 2,078 | 2,162 |
Additions | 291 | 238 |
Interest expense related to lease liabilities | 95 | 103 |
Disposals | (105) | (11) |
Repayment of lease liabilities (including interest) | (359) | (340) |
Exchange adjustments | (33) | (74) |
Lease liabilities, ending balance | 1,967 | 2,078 | 2,162
Plant and machinery |  |  |
Disclosure Of Leases [Line Items] |  |  |
Beginning balance, right-of-use assets | 73 | 46 |
Additions | 24 | 50 |
Transfers to net investment in subleases |  | 0 |
Disposals | (21) | (1) |
Depreciation of right-of-use assets | (16) | (21) | (17)
Impairment charges included within restructuring costs | 0 | 0 |
Exchange adjustments | (3) | (1) |
Ending balance, right-of-use assets | 57 | 73 | 46
Lease liabilities, beginning balance | 76 | 48 |
Additions | 16 | 50 |
Interest expense related to lease liabilities | 3 | 3 |
Disposals | (21) | (2) |
Repayment of lease liabilities (including interest) | (18) | (22) |
Exchange adjustments | (3) | (1) |
Lease liabilities, ending balance | £ 53 | £ 76 | £ 48

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_h&doctype=Standard -URIDate 2024-03-27 + Details
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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 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease in right-of-use assets resulting from disposals. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. 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 -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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