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Inventories (Details) - GBP (£)
6 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Inventories      
Finished goods £ 3,272,000 £ 2,876,000 £ 2,200,000
Cost of inventory recognized during the period £ 7,042,000 £ 7,263,000 £ 11,345,000