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Provisions - Summary of Provisions (Detail) - GBP (£)
£ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Disclosure provisions [line items]    
Provisions £ 4,334 £ 4,123
Current 2,945 2,803
Non-current 1,389 1,320
Provision for deferred cash consideration [member]    
Disclosure provisions [line items]    
Provisions £ 4,334 £ 4,123