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Trade and other payables - Summary of Trade and Other Payables, Amounts Falling Due After More Than One Year (Detail) - GBP (£) £ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
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Trade and other non-current payables [abstract] |  |  |  |  |  |
Payments due to vendors (earnout agreements) | [1] | £ 100.3 |  | £ 251.7 |  |
Liabilities in respect of put option agreements with vendors | [1] | 128.8 |  | 188.6 |  |
Fair value of derivatives | [1] | 21.2 |  | 14.2 |  |
Other creditors and accruals | [1] | 199.3 |  | 355.5 |  |
Trade and other payables | [2] | £ 449.6 | [1] | £ 810.0 | [1] | £ 911.7
[1] | Figures have been restated to be in accordance with IAS 39 Financial Instruments: Recognition and Measurement, as described in the accounting policies.
[2] | Figures have been restated, as described in the accounting policies.

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- Definition The amount of non-current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of non-current trade payables and non-current other payables. [Refer: Other non-current payables; Non-current trade payables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph k -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_k&doctype=Standard -URIDate 2019-03-27 + Details
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- References No definition available. + Details
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- Definition The amount of non-current payables that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Contingent consideration non-current payable to vendors (earnout agreements). + References No definition available. + Details
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- Definition Liabilities of put option agreements with vendors, non-current. + References No definition available. + Details
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