v3.26.1
Business combinations - Narrative (Details) - GBP (£)
£ in Thousands
Dec. 31, 2025
Jul. 01, 2025
Jun. 30, 2025
Disclosure of detailed information about business combination [line items]      
Goodwill £ 478,156   £ 473,296
Class35 Limited      
Disclosure of detailed information about business combination [line items]      
Cash transferred   £ 3,300  
Equity interests of acquirer   600  
Deferred consideration, acquisition-date fair value   100  
Identifiable assets acquired (liabilities assumed)   1,400  
Customer-related intangible assets recognised as of acquisition date   300  
Goodwill   £ 2,300