v3.24.3
Financial Instrument Risk - Narrative (Details)
£ in Millions
 12 Months Ended
Jun. 30, 2024
GBP (£)
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Liquidity cycle 30 days
Currency risk  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Hedge effectiveness percentage 100.00%
Currency risk | GBP  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Percentage of entity's revenue 31.50%
Currency risk | USD  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Percentage of entity's revenue 35.60%
Percentage of entity's expenses 13.90%
Currency risk | EUR  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Percentage of entity's revenue 22.80%
Percentage of entity's expenses 53.50%
Interest rate risk  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Percentage of reasonably possible increase in actuarial assumption 1.00%
Increase in interest expense £ 3.5