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Pension arrangements - Defined contribution schemes (Details) - GBP (£)
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Pension arrangements      
Contributions to defined contribution pension arrangements £ 4,352,000 £ 4,974,000 £ 4,480,000
Amount of contributions due that had not been paid to pension schemes £ 617,000 £ 714,000