v3.26.1
Financial instruments - risk management (Details 4) - Liquidity risk [member] - GBP (£)
£ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Liquidity risk [member]      
IfrsStatementLineItems [Line Items]      
Total  
Government and research loans [member]      
IfrsStatementLineItems [Line Items]      
Total    
Not later than three months [member]      
IfrsStatementLineItems [Line Items]      
Total 2,188 2,211  
Not later than three months [member] | Trade and other payables [member]      
IfrsStatementLineItems [Line Items]      
Total 1,974 1,986 1,178
Not later than three months [member] | Deferred considerations [member]      
IfrsStatementLineItems [Line Items]      
Total 166 178  
Not later than three months [member] | Promissory Note [Member]      
IfrsStatementLineItems [Line Items]      
Total  
Not later than three months [member] | Finance Lease [member]      
IfrsStatementLineItems [Line Items]      
Total 48 47 47
Not later than three months [member] | Government and research loans [member]      
IfrsStatementLineItems [Line Items]      
Total     1,225
Later than three months and not later than one year [member]      
IfrsStatementLineItems [Line Items]      
Total 513 1,154  
Later than three months and not later than one year [member] | Trade and other payables [member]      
IfrsStatementLineItems [Line Items]      
Total
Later than three months and not later than one year [member] | Deferred considerations [member]      
IfrsStatementLineItems [Line Items]      
Total 497 533  
Later than three months and not later than one year [member] | Promissory Note [Member]      
IfrsStatementLineItems [Line Items]      
Total 479  
Later than three months and not later than one year [member] | Finance Lease [member]      
IfrsStatementLineItems [Line Items]      
Total 16 142 141
Later than three months and not later than one year [member] | Government and research loans [member]      
IfrsStatementLineItems [Line Items]      
Total     141
Later than one year and not later than two years [member]      
IfrsStatementLineItems [Line Items]      
Total 662 822  
Later than one year and not later than two years [member] | Trade and other payables [member]      
IfrsStatementLineItems [Line Items]      
Total
Later than one year and not later than two years [member] | Deferred considerations [member]      
IfrsStatementLineItems [Line Items]      
Total 662 711  
Later than one year and not later than two years [member] | Promissory Note [Member]      
IfrsStatementLineItems [Line Items]      
Total  
Later than one year and not later than two years [member] | Finance Lease [member]      
IfrsStatementLineItems [Line Items]      
Total   111 189
Later than one year and not later than two years [member] | Government and research loans [member]      
IfrsStatementLineItems [Line Items]      
Total     189
Later than two years and not later than five years [member]      
IfrsStatementLineItems [Line Items]      
Total 711  
Later than two years and not later than five years [member] | Trade and other payables [member]      
IfrsStatementLineItems [Line Items]      
Total
Later than two years and not later than five years [member] | Deferred considerations [member]      
IfrsStatementLineItems [Line Items]      
Total 711  
Later than two years and not later than five years [member] | Promissory Note [Member]      
IfrsStatementLineItems [Line Items]      
Total  
Later than two years and not later than five years [member] | Finance Lease [member]      
IfrsStatementLineItems [Line Items]      
Total 112
Later than two years and not later than five years [member] | Government and research loans [member]      
IfrsStatementLineItems [Line Items]      
Total     112
Later than five years [member] | Trade and other payables [member]      
IfrsStatementLineItems [Line Items]      
Total
Later than five years [member] | Deferred considerations [member]      
IfrsStatementLineItems [Line Items]      
Total  
Later than five years [member] | Promissory Note [Member]      
IfrsStatementLineItems [Line Items]      
Total  
Later than five years [member] | Finance Lease [member]      
IfrsStatementLineItems [Line Items]      
Total