v3.25.2
Financial risk management and impairment of financial assets - Maturity analysis (Details) - GBP (£)
£ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Financial liabilities for which maturity is disclosed    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative and non derivative financial liabilities £ 121,585 £ 126,101
Financial liabilities for which maturity is disclosed | Within 1 year    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative and non derivative financial liabilities 15,289 16,290
Financial liabilities for which maturity is disclosed | Between 2 and 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative and non derivative financial liabilities 105,885 109,315
Financial liabilities for which maturity is disclosed | After more than 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative and non derivative financial liabilities 411 496
Trade and other payables    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 18,107 19,576
Trade and other payables | Within 1 year    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 14,458 15,585
Trade and other payables | Between 2 and 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 3,649 3,991
Lease liabilities    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 2,483 2,610
Lease liabilities | Within 1 year    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 831 705
Lease liabilities | Between 2 and 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 1,241 1,409
Lease liabilities | After more than 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, non-derivative financial liabilities 411 496
Convertible senior secured notes    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative financial liabilities 100,995 103,915
Convertible senior secured notes | Between 2 and 5 years    
Financial risk management and impairment of financial assets    
Undiscounted cash flows, derivative financial liabilities £ 100,995 £ 103,915