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Financial instruments - Financial liabilities at amortized cost (Details) - Financial liabilities at amortized cost - GBP (£)
£ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Financial liabilities    
Carrying Value £ 47,659 £ 9,458
Fair Value 47,659 9,458
Trade and other payables .    
Financial liabilities    
Carrying Value 45,717 2,128
Fair Value 45,717 2,128
Borrowings    
Financial liabilities    
Carrying Value   6,309
Fair Value   6,309
Lease liabilities.    
Financial liabilities    
Carrying Value 1,942 1,021
Fair Value £ 1,942 £ 1,021