v3.26.3
Additional information - Financial Statement Schedule I - Reconciliations (Details) - GBP (£)
£ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
IFRS profit/(loss) reconciliation:        
Additional loss if subsidiaries had been accounted for on the equity method of accounting as opposed to cost £ (43,802) £ (32,124) £ (61,478)  
Profit/(loss) for the year (42,954) (33,023) (113,159)  
IFRS equity reconciliation:        
Additional loss if subsidiaries had been accounted for on the equity method of accounting as opposed to cost (331,965) (287,504) (256,603)  
IFRS equity 150,363 193,733 144,890 £ 103,950
Parent        
IFRS profit/(loss) reconciliation:        
Profit/(loss) for the year 848 (899) (51,681)  
IFRS equity reconciliation:        
IFRS equity £ 482,328 £ 481,237 £ 401,493 £ 293,757