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Trade and other receivables (Details) - GBP (£)
£ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Trade and other receivables        
Government grants receivable £ 1,241 £ 5,415 £ 8,943 £ 1,989
Prepayments 4,203 6,571   733
Other receivables 2,514 672   810
Total trade and other current receivables 14,157 12,658   3,532
R&D tax credit receivable £ 4,909 2,716   328
VAT receivables   2,595   6
Prepaid insurance   £ 3,805   £ 0