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Inventories (Tables)
6 Months Ended
Dec. 31, 2021
Inventories [Abstract]  
Schedule of inventories
31 December 202130 June 202131 December 2020
£ million£ million
£ million
Raw materials and consumables401 348 332 
Work in progress68 60 53 
Maturing inventories4,801 4,668 4,562 
Finished goods and goods for resale965 969 803 
6,235 6,045 5,750