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Operating expenses by nature (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating expenses by nature |  |  |
Employee costs | £ 1,736 | £ 1,405 | £ 1,305
Direct materials and services | 704 | 586 | 583
Vehicle costs | 201 | 146 | 134
Property costs | 82 | 60 | 65
Depreciation and impairment of property, plant and equipment | 140 | 128 | 132
Amortisation and impairment of intangible assets | 140 | 91 | 101
One-off and adjusting items - operating | 136 | 21 | 8
Other operating expenses | 234 | 173 | 181
Total operating expenses | £ 3,373 | £ 2,610 | £ 2,509

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- Definition The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of all operating expenses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_85&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of raw materials and consumables used in the production process or in the rendering of services. [Refer: Current raw materials] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_102&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_99&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Amount of amortisation and impairment of intangible assets incurred by the company. + References No definition available. + Details
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- Definition Amount of property costs incurred by the company. + References No definition available. + Details
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- Definition Amount of vehicle costs incurred by the company. + References No definition available. + Details
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