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Warrants - change in fair value (Details) - GBP (£)
£ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Warrants    
January 1,2021 £ 10,730  
Additions   £ 17,801
Change in fair value recognised in profit or loss £ (4,373) (6,817)
Foreign exchange movements   (254)
December 31, 2021   £ 10,730