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Pension arrangements - Defined contribution schemes (Details) - GBP (£)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Pension arrangements      
Contributions to defined contribution pension arrangements £ 3,362,000 £ 3,287,000 £ 2,882,000
Amount of contributions due that had not been paid to pension schemes £ 475,000 £ 458,000