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Financial instruments - Financial assets at amortized cost (Details) - Financial assets at amortized cost - GBP (£)
Dec. 31, 2021
Dec. 31, 2020
Financial assets    
Carrying value £ 213,332 £ 1,649
Fair value 213,332 1,649
Trade and other receivables.    
Financial assets    
Carrying value 672 810
Fair value 672 810
Cash at bank    
Financial assets    
Carrying value 212,660 839
Fair value £ 212,660 £ 839