v3.26.1
Share-Based Payment Arrangements - Movement in Share Options (Details)
 6 Months Ended
Dec. 31, 2025
shares
£ / shares
Dec. 31, 2024
shares
CSOP    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 0  
Options granted during the period (in shares) 0  
Options exercised during the period (in shares) 0  
Options forfeited during the period (in shares) 0  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 0  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 0  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 0  
Weighted average remaining contractual life (in years) 0 years  
JSOP    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 6,965  
Options granted during the period (in shares) 0  
Options exercised during the period (in shares) 0  
Options forfeited during the period (in shares) 0  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 6,965  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 0  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 0  
Weighted average remaining contractual life (in years) 11 years  
LTIP    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 0  
Options granted during the period (in shares) 0  
Options exercised during the period (in shares) 0  
Options forfeited during the period (in shares) 0  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 0  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 0  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 0  
Weighted average remaining contractual life (in years) 0 years  
EIP    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 1,887,397  
Options granted during the period (in shares) 3,081,896  
Options exercised during the period (in shares) (509,952)  
Options forfeited during the period (in shares) (174,808)  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 4,284,533  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 0  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 6.65  
Weighted average remaining contractual life (in years) 3 years  
SAYE    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 0  
Options granted during the period (in shares) 0  
Options exercised during the period (in shares) 0  
Options forfeited during the period (in shares) 0  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 0  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 0  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 0  
Weighted average remaining contractual life (in years) 0 years  
SSP (under EIP scheme)    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share options outstanding at beginning of period (in shares) 3,871,057  
Options granted during the period (in shares) 0 0
Options exercised during the period (in shares) 0  
Options forfeited during the period (in shares) (335,108)  
Number of share options expired in share-based payment arrangement (in shares) 0  
Share options outstanding at end of period (in shares) 3,535,949  
Weighted average exercise price of share options outstanding in share-based payment arrangement (in gbp per share) | £ / shares £ 28.48  
Weighted average share price for share options in share-based payment arrangement exercised during period at date of exercise (in gpb per share) | £ / shares £ 0  
Weighted average remaining contractual life (in years) 5 years