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Other operating income (Details) - GBP (£)
£ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other operating income      
Government grants £ 8,829 £ 1,989  
R&D tax credit 2,388 328 £ 399
Other 135    
Other operating income £ 11,352 £ 2,317 £ 399