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Trade and other payables (Details) - GBP (£)
£ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Outstanding defined contribution pension costs   £ 9 £ 70
Social security and other taxes includes stamp duty payable   6,669  
Within 1 year      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Trade payables £ 1,861 6,715 846
Accrued expenses 7,145 26,358 1,226
Amounts due to related parties     56
Social security and other taxes 602 7,145 203
Outstanding defined contribution pension costs 177 9 70
Total trade and other payables 9,785 40,227 £ 2,401
Financial and capital markets advisory fees   9,666  
After more than one year      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Deferred transaction fee payable £ 6,632 £ 5,975