v3.26.3
Additional information - Financial Statement Schedule I - Condensed statement of changes in equity (Details) - GBP (£)
£ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Balance at beginning of the year £ 193,733 £ 144,890 £ 103,950
Profit/(loss) for the year (42,954) (33,023) (113,159)
Total comprehensive loss for the year (43,813) (31,800) (118,161)
Proceeds from issue of shares   79,985 158,541
Equity-settled share-based payments 243 658 875
Balance at end of the year 150,363 193,733 144,890
Share capital      
Balance at beginning of the year 56 55 53
Proceeds from issue of shares   1 2
Balance at end of the year 56 56 55
Share premium      
Balance at beginning of the year 307,345 227,361 68,822
Proceeds from issue of shares   79,984 158,539
Balance at end of the year 307,345 307,345 227,361
Treasury shares      
Balance at beginning of the year (21,305) (21,305) (21,305)
Balance at end of the year (21,305) (21,305) (21,305)
Retained earnings      
Balance at beginning of the year (341,616) (309,251) (196,652)
Profit/(loss) for the year (42,954) (33,023) (113,159)
Total comprehensive loss for the year (42,954) (33,023) (113,159)
Equity-settled share-based payments 243 658 875
Balance at end of the year (384,127) (341,616) (309,251)
Parent      
Balance at beginning of the year 481,237 401,493 293,757
Profit/(loss) for the year 848 (899) (51,681)
Total comprehensive loss for the year 848 (899) (51,681)
Proceeds from issue of shares   79,985 158,541
Equity-settled share-based payments 243 658 876
Balance at end of the year 482,328 481,237 401,493
Parent | Share capital      
Balance at beginning of the year 56 55 53
Proceeds from issue of shares   1 2
Balance at end of the year 56 56 55
Parent | Share premium      
Balance at beginning of the year 307,345 227,361 68,822
Proceeds from issue of shares   79,984 158,539
Balance at end of the year 307,345 307,345 227,361
Parent | Treasury shares      
Balance at beginning of the year (21,305) (21,305) (21,305)
Balance at end of the year (21,305) (21,305) (21,305)
Parent | Retained earnings      
Balance at beginning of the year 195,141 195,382 246,187
Profit/(loss) for the year 848 (899) (51,681)
Total comprehensive loss for the year 848 (899) (51,681)
Equity-settled share-based payments 243 658 876
Balance at end of the year £ 196,232 £ 195,141 £ 195,382