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Trade and other receivables (Details) - GBP (£)
£ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Trade and other receivables      
Government receivable £ 7,440 £ 5,415  
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