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Costs of services and general and administrative costs - Summary of Operating Costs (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Analysis of income and expense [abstract] |  |  |
Costs of services | £ 12,290 | £ 12,326 | £ 11,890
General and administrative costs | 1,126 | 1,988 | 1,181
Costs of services and general and administrative costs | 13,416 | 14,314 | 13,071
Costs of services and general and administrative costs include: |  |  |
Staff costs (note 5) | 7,761 | 8,137 | 8,166
Establishment costs | 472 | 516 | 536
Media pass-through costs | 2,523 | 2,174 | 1,906
Other costs of services and general and administrative costs | 2,660 | 3,487 | 2,463
Other pass-through costs | 859 | 811 | 724
Goodwill impairment (note 11) | 237 | 63 | 38
Amortisation and impairment of acquired intangible assets | 93 | 728 | 62
Other impairment charges | 26 | 18 | 77
Restructuring and transformation costs | 251 | 196 | 219
Property-related restructuring costs | 26 | 232 | 18
(Gains)/losses on disposal of investments and subsidiaries | (322) | (7) | 36
Legal provision charges/(gains) | £ 68 | £ (11) | £ 0

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- Definition The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_99&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_103&doctype=Standard -URIDate 2024-03-27 + Details
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