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Deferred tax - Analysis of the deferred tax (Details) - GBP (£)
£ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Analysis of deferred tax      
Deferred tax liabilities £ 7,402 £ 35,546  
Net deferred tax liability/(asset) 7,402 35,546 £ (27,025)
US      
Analysis of deferred tax      
Net deferred tax liability/(asset)     (58,362)
UK      
Analysis of deferred tax      
Deferred tax liabilities 7,402 35,546  
Net deferred tax liability/(asset) £ 7,402 £ 35,546 £ 31,337