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Acquisition of Subsidiaries - Acquisition Related Costs (Details) - GBP (£) £ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Velocity Partners |  |
Disclosure of detailed information about business combination [line items] |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination | £ 1,233 |
ISDC |  |
Disclosure of detailed information about business combination [line items] |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  | £ 550

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- Definition The amount of acquisition-related costs recognised as an expense for transactions that are recognised separately from the acquisition of assets and the assumption of liabilities in business combinations. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_m&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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