Financial risk management - Hedging activities (Details) £ in Thousands, $ in Thousands |
Jun. 30, 2026
€ / £
|
Jun. 30, 2026
$ / £
|
Jun. 30, 2026
GBP (£)
|
Jun. 30, 2026
USD ($)
|
Jun. 30, 2025
€ / £
|
Jun. 30, 2025
$ / £
|
Jun. 30, 2025
GBP (£)
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2024
€ / £
|
Jun. 30, 2024
$ / £
|
Jun. 30, 2024
GBP (£)
|
|---|---|---|---|---|---|---|---|---|---|---|---|
| Financial risk management activities | |||||||||||
| Net debt | £ | £ 621,708 | £ 550,869 | £ 473,072 | ||||||||
| Closing exchange rate | 1.1615 | 1.3272 | 1.1667 | 1.3709 | 1.1799 | 1.2643 | |||||
| US dollar | |||||||||||
| Financial risk management activities | |||||||||||
| Net debt | $ 763,800 | $ 617,500 | |||||||||
| Hedged future USD revenues | (166,000) | (250,000) | |||||||||
| Unhedged USD borrowings | 597,800 | 367,500 | |||||||||
| Borrowings | US dollar | |||||||||||
| Financial risk management activities | |||||||||||
| Net debt | 775,000 | 650,000 | |||||||||
| Cash and cash equivalents | |||||||||||
| Financial risk management activities | |||||||||||
| Net debt | £ | £ (67,246) | £ (86,105) | £ (73,549) | ||||||||
| Cash and cash equivalents | US dollar | |||||||||||
| Financial risk management activities | |||||||||||
| Net debt | $ (11,200) | $ (32,500) |