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Leases - Movement in lease liabilities (Details) - GBP (£)
£ in Thousands
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Leases    
Beginning balance £ 8,641 £ 8,880
Cash flows (889) (1,669)
Additions 81 749
Accretion expense 638 681
Ending balance £ 8,471 £ 8,641