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Dividends (Details)
6 Months Ended
Dec. 31, 2022
GBP (£)
Jun. 30, 2022
GBP (£)
Dec. 31, 2021
GBP (£)
Dec. 31, 2021
USD ($)
$ / shares
Disclosure of classes of share capital        
Dividends paid £ 0 £ 22,884,000 £ 10,669,000 $ 14,669,000
Dividends paid per share       $ 0.09