Operating lease arrangements - Aggregate minimum rentals receivable (Details) - GBP (£) £ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Operating lease arrangements by lessor
Future minimum lease rentals receivable under non-cancellable operating lease	£ 13,694	£ 15,803
Less than 1 year
Operating lease arrangements by lessor
Future minimum lease rentals receivable under non-cancellable operating lease	1,278	1,257
Later than 1 year and no later than 5 years
Operating lease arrangements by lessor
Future minimum lease rentals receivable under non-cancellable operating lease	2,866	4,617
Over 5 years
Operating lease arrangements by lessor
Future minimum lease rentals receivable under non-cancellable operating lease	£ 9,550	£ 9,929

The amount of future minimum lease payments receivable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2017-01-01
-Paragraph 56
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_56_a&doctype=Standard&book=B
-URIDate 2017-03-09

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant