Tax on Profit on Ordinary Activities (Current Tax) (Details) - GBP (£) £ in Thousands	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Disclosure of income tax [Abstract]
Current tax	£ (483)	£ 2,584

The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 12
-IssueDate 2019-01-01
-Paragraph 80
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_80_a&doctype=Standard
-URIDate 2019-03-27

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