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Expenses by nature - Share based payment expense (Details) - GBP (£)
£ in Thousands
12 Months Ended
Jun. 10, 2021
Dec. 31, 2021
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions   £ 111,996
Capital Reorganization [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions   84,712
Issuance of PIPE shares to suppliers and partners    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions   10,389
Enterprise Management Initiative [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions   156
Issuance of Class Z shares to American    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions £ 16,739 £ 16,739