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Share of results of associates - Summary of Share of Results of Associates (Detail) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | [1] | Dec. 31, 2017 | [1]
Disclosure of associates [line items] |  |  |  |
Share of profit loss of associates accounted for using equity method | £ 14.7 |  | £ 30.5 | £ 98.0
Continuing Operation one [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Share of profit before interest and taxation | 99.2 | [2] | 110.8 | 129.7
Share of exceptional (losses)/gains | (47.8) | [2] | (41.5) | 0.6
Share of interest and non-controlling interests | (19.4) | [2] | (15.1) | (12.6)
Share of taxation | (17.3) | [2] | (23.7) | (19.7)
Share of profit loss of associates accounted for using equity method | £ 14.7 | [2] | £ 30.5 | £ 98.0
[1] | Prior year figures have been re-presented in accordance with IFRS 5 Non-current Assets Held for Sale and Discontinued Operations, as described in the accounting policies.
[2] | From 5 December 2019 approximately 90% of the Kantar business is treated as a 40% associate following the completion of the transaction outlined in note 12.

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- Definition Share of profit before interest and taxation of associates. + References No definition available. + Details
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