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Cash Flow Adjustments and Changes in Working Capital - Cash Flow Statement Adjustments (Details) - GBP (£) £ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Adjustments |  |  |
Depreciation, amortisation and impairment of non-financial assets | £ 6,269 | £ 4,346 | £ 2,882
Foreign exchange loss / (gain) | 354 | 1,015 | (140)
Interest income | (35) | (18) | (21)
Fair value movement of financial liabilities / assets | 229 | 0 | (1,043)
Interest expense | 573 | 408 | 170
(Gain)/loss on disposal of non-current assets | (5) | 107 | (15)
Share-based compensation | 1,505 | 854 | 768
Income on contingent consideration | 0 | (180) | 0
Research and development tax credit | (1,008) | (1,322) | (1,117)
Grant income | (1,633) | (1,691) | (1,048)
Total adjustments | 6,249 | 3,519 | 436
Net changes in working capital |  |  |
Increase in trade and other receivables | (6,384) | (7,598) | (6,765)
Increase/(decrease) in trade and other payables | 13,223 | 2,590 | (888)
Net changes in working capital | £ 6,839 | £ (5,008) | £ (7,653)

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