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Related party transactions - Summary of related party transaction outstanding (Detail) - Associates - GBP (£) £ in Millions | Jun. 30, 2022 | Dec. 31, 2021
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Amounts owed by related parties |  |
Amounts owed by related parties | £ 70.7 | £ 76.0
Amounts owed to related parties |  |
Amounts owed to related parties | (72.8) | (57.6)
Kantar |  |
Amounts owed by related parties |  |
Amounts owed by related parties | 27.9 | 30.3
Amounts owed to related parties |  |
Amounts owed to related parties | (6.3) | (6.2)
Other |  |
Amounts owed by related parties |  |
Amounts owed by related parties | 42.8 | 45.7
Amounts owed to related parties |  |
Amounts owed to related parties | £ (66.5) | £ (51.4)

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