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Revenue recognition and operating segments - Other segment items included in the consolidated income statement (Details) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | £ 118 | £ 74 | £ 82
Amortisation and impairment of intangible assets, Tax effect | (25) | (18) | (18)
Amortisation and impairment of intangible assets, Total after tax effect | 93 | 56 | 64
Operating segments | North America |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | 59 | 34 | 30
Operating segments | Europe |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | 29 | 14 | 15
Operating segments | UK & Sub Saharan Africa |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total |  | 9 | 9
Operating segments | Asia & MENAT |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | 20 | 7 | 17
Operating segments | Pacific |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | 4 | 4 | 4
Central and regional overheads |  |  |
Disclosure of operating segments |  |  |
Amortisation and impairment of intangible assets, Total | £ 6 | £ 6 | £ 7

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