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Earnings Per Share (Basic Earnings Per Share) (Details) - GBP (£)
£ / shares in Units, £ in Thousands
6 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of earnings per share [Abstract]    
Profit for the period attributable to equity holders of the Company £ 696 £ 9,465
Weighted average number of shares outstanding (in shares) 52,848,507 48,859,382
Earnings per share - basic (in gbp per share) £ 0.01 £ 0.19