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Inventories (Details) - GBP (£)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Inventories      
Finished goods £ 1,416,000 £ 1,637,000  
Cost of inventory recognized during the period 8,450,000 8,598,000 £ 7,228,000
(Reversal)/write-down of inventories to net realizable value £ (4,000) £ (173,000) £ 177,000