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Other investments (Tables)
12 Months Ended
Jun. 30, 2023
Disclosure Of Noncurrent Investments Other Than Investments Accounted For Using Equity Method [Abstract]  
Schedule of movements in other investments
Loans
£ million
Other investments
£ million
Total
£ million
Cost less allowances or fair value
At 30 June 202110 30 40 
Exchange differences
Additions15 
Repayments and disposals(1)(1)(2)
Fair value adjustment— (13)(13)
Step acquisitions— (6)(6)
Capitalised interest— 
Transfer— (1)(1)
At 30 June 202218 19 37 
Exchange differences(1) (1)
Additions20 9 29 
Repayments and disposals(3) (3)
Fair value adjustment (4)(4)
Capitalised interest1  1 
Impairment charged during the year (2)(2)
At 30 June 202335 22 57