XML 72 R64.htm IDEA: XBRL DOCUMENT v3.23.2
Trade and other receivables - Additional information (Detail) - GBP (£)
£ in Millions
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]      
Surplus in pension plan £ 16.0   £ 15.4
Allowance for bad and doubtful debts as a percentage of gross trade accounts receivables 0.80%   1.00%
Trade receivables      
Disclosure of detailed information about financial instruments [line items]      
Bad debt expenses £ 5.4 £ 11.5