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Leases - Amounts recognised in the consolidated income statement - Narrative (Details) - GBP (£)
£ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Disclosure Of Quantitative Information About Leases [Line Items]    
Expenses in respect of leases of low value assets and short term leases £ 57 £ 39
Expenses in respect of variable lease payments 4 9
Total cash outflow for leases £ 172 £ 154