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Operating costs - Exceptional operating items (Details) - GBP (£)
£ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Depreciation, amortisation and impairment      
Depreciation, amortisation and impairment £ 1,066 £ 828 £ 447
Staff costs 1,830 1,795 1,586
Other external charges 2,747 2,597 1,978
Other operating income (34) (14) (26)
Operating profit/(loss) (4,632) (4,409) (3,731)
Cost of sales 6,899 5,973 5,038
Total exceptional items      
Depreciation, amortisation and impairment      
Staff costs 10 0 5
Other external charges 60 52 13
Other operating income (18) 0 (3)
Operating profit/(loss) 622 388 15
Cost of sales 67 0 0
Other operating expenses 555 388 15
Total exceptional items | Intangible assets [Member]      
Depreciation, amortisation and impairment      
Depreciation, amortisation and impairment 498 336 0
Total exceptional items | Property, plant and equipment      
Depreciation, amortisation and impairment      
Depreciation, amortisation and impairment £ 72 £ 0 £ 0