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Segmental analysis - Contributions by geographical area (Detail) - GBP (£) £ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Disclosure of geographical areas [line items] |  |
Revenue | £ 6,755.3 | £ 6,132.5
Revenue less pass- through costs |  |
Headline operating profit | 639.1 | 590.4
North America |  |
Disclosure of geographical areas [line items] |  |
Revenue | 2,586.5 | 2,183.7
Revenue less pass- through costs | 2,188.9 | 1,817.6
Headline operating profit | 299.7 | 271.4
United Kingdom |  |
Disclosure of geographical areas [line items] |  |
Revenue | 956.1 | 927.0
Revenue less pass- through costs | 737.0 | 679.7
Headline operating profit | 67.3 | 83.5
Western Continental Europe |  |
Disclosure of geographical areas [line items] |  |
Revenue | 1,352.0 | 1,340.6
Revenue less pass- through costs | 1,086.1 | 1,050.0
Headline operating profit | 98.7 | 103.7
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe |  |
Disclosure of geographical areas [line items] |  |
Revenue | 1,860.7 | 1,681.2
Revenue less pass- through costs | 1,497.5 | 1,351.9
Headline operating profit | 173.4 | 131.8
United States |  |
Disclosure of geographical areas [line items] |  |
Revenue | 2,440.9 | 2,046.9
Revenue less pass- through costs | 2,052.1 | 1,695.9
Headline operating profit | £ 280.9 | £ 254.1

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