v3.26.3
Property, plant and equipment (Details) - GBP (£)
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Reconciliation of changes in property, plant and equipment      
Opening amount £ 292,334,000 £ 256,118,000  
Additions 84,504,000 51,892,000  
Depreciation charge (19,544,000) (15,676,000) £ (14,998,000)
Closing amount 357,294,000 292,334,000 256,118,000
Net book amount of property, plant and equipment pledged as security 204,945,000 211,132,000  
Cost      
Reconciliation of changes in property, plant and equipment      
Opening amount 459,589,000 414,641,000  
Closing amount 544,093,000 459,589,000 414,641,000
Accumulated depreciation      
Reconciliation of changes in property, plant and equipment      
Opening amount (167,255,000) (158,523,000)  
Closing amount (186,799,000) (167,255,000) (158,523,000)
Freehold property      
Reconciliation of changes in property, plant and equipment      
Opening amount 216,554,000 220,033,000  
Additions 64,799,000    
Transfers 35,430,000    
Depreciation charge (4,734,000) (3,479,000)  
Closing amount 312,049,000 216,554,000 220,033,000
Freehold property | Cost      
Reconciliation of changes in property, plant and equipment      
Opening amount 289,943,000 289,943,000  
Closing amount 390,172,000 289,943,000 289,943,000
Freehold property | Accumulated depreciation      
Reconciliation of changes in property, plant and equipment      
Opening amount (73,389,000) (69,910,000)  
Closing amount (78,123,000) (73,389,000) (69,910,000)
Plant and machinery      
Reconciliation of changes in property, plant and equipment      
Opening amount 8,636,000 11,414,000  
Additions 6,502,000 2,649,000  
Transfers 5,457,000    
Depreciation charge (7,186,000) (5,427,000)  
Closing amount 13,409,000 8,636,000 11,414,000
Plant and machinery | Cost      
Reconciliation of changes in property, plant and equipment      
Opening amount 43,560,000 45,809,000  
Closing amount 55,519,000 43,560,000 45,809,000
Plant and machinery | Accumulated depreciation      
Reconciliation of changes in property, plant and equipment      
Opening amount (34,924,000) (34,395,000)  
Closing amount (42,110,000) (34,924,000) (34,395,000)
Fixtures and fittings      
Reconciliation of changes in property, plant and equipment      
Opening amount 25,137,000 24,671,000  
Additions 2,768,000 7,236,000  
Transfers 11,555,000    
Depreciation charge (7,624,000) (6,770,000)  
Closing amount 31,836,000 25,137,000 24,671,000
Fixtures and fittings | Cost      
Reconciliation of changes in property, plant and equipment      
Opening amount 84,079,000 78,889,000  
Closing amount 98,402,000 84,079,000 78,889,000
Fixtures and fittings | Accumulated depreciation      
Reconciliation of changes in property, plant and equipment      
Opening amount (58,942,000) (54,218,000)  
Closing amount (66,566,000) (58,942,000) £ (54,218,000)
Assets under construction      
Reconciliation of changes in property, plant and equipment      
Opening amount 42,007,000    
Additions 10,435,000 42,007,000  
Transfers (52,442,000)    
Closing amount   42,007,000  
Assets under construction | Cost      
Reconciliation of changes in property, plant and equipment      
Opening amount £ 42,007,000    
Closing amount   £ 42,007,000