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Inventories (Details) - GBP (£)
6 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Inventories      
Finished goods £ 2,876,000 £ 2,792,000 £ 2,080,000
Cost of inventory recognized during the period £ 7,263,000 £ 3,211,000 £ 5,061,000