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Segmental analysis (Tables)
 6 Months Ended
Jun. 30, 2025
Disclosure of operating segments [abstract]  
Summary of Contributions by Reportable Segments
Reported contributions by reportable segments were as follows:
Six Months Ended
30 June 2025		Six Months Ended
30 June 2024
£m£m
Revenue1
Global Integrated Agencies5,871 6,117 
Public Relations351 601 
Specialist Agencies441 509 
6,663 7,227 
Revenue less pass-through costs1,2
Global Integrated Agencies4,302 4,595 
Public Relations335 568 
Specialist Agencies389 436 
5,026 5,599 
Headline operating profit1,3
Global Integrated Agencies352 551 
Public Relations39 80 
Specialist Agencies21 15 
412 646 
Adjusting items within IFRS operating profit3
(191)(223)
Financing items4
(140)(101)
Earnings from associates
17 16 
Reported profit before tax98 338 
Notes
1 Intersegment transactions have not been separately disclosed as they are not material.
2 Revenue less pass-through costs is revenue less media and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominately media costs.
3 A reconciliation from reported profit before tax to headline operating profit is also provided in Note 11.
4 Financing items include finance and investment income, finance costs and revaluation and retranslation of financial instruments.
Summary of Contributions by Geographical Area
Reported contributions by geographical area were as follows:
Six Months Ended
30 June 2025		Six Months Ended
30 June 2024
£m£m
Revenue1
North America2
2,537 2,781 
United Kingdom1,011 1,058 
Western Continental Europe1,351 1,458 
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe1,764 1,930 
6,663 7,227 
Revenue less pass-through costs1,3
North America3
1,966 2,207 
United Kingdom749 779 
Western Continental Europe1,021 1,164 
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe1,290 1,449 
5,026 5,599 
Headline operating profit1,4
North America2
281 336 
United Kingdom47 78 
Western Continental Europe36 117 
Asia Pacific, Latin America, Africa & Middle East and Central & Eastern Europe48 115 
412 646 
Adjusting items within IFRS operating profit4
(191)(223)
Financing items5
(140)(101)
Earnings from associates
17 16 
Reported profit before tax98 338 
Notes
1 Interregional transactions have not been separately disclosed as they are not material.
2 North America includes the US, which has revenue of £2,387 million (2024: £2,609 million), revenue less pass-through costs of £1,852 million (2024: £2,071 million) and headline operating profit of £264 million (2024: £316 million).
3 Revenue less pass-through costs is revenue less media and other pass-through costs. Pass-through costs comprise fees paid to external suppliers where they are engaged to perform part or all of a specific project and are charged directly to clients, predominantly media costs. See note 2 to the consolidated interim financial statements for more details of the pass-through costs.
4 A reconciliation from reported profit before tax to headline operating profit is also provided in Note 11.
5 Financing items include finance and investment income, finance costs and revaluation and retranslation of financial instruments.