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Taxation - Unrecognised deferred tax assets (Details) - GBP (£) £ in Millions | Jun. 30, 2022 | Jun. 30, 2021
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross value of tax losses which has not been recognised | £ 674 | £ 708
Unrecognised deferred tax assets | 169 | 178
Capital losses – indefinite |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unrecognised deferred tax assets | 98 | 105
Trading losses – indefinite |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unrecognised deferred tax assets | 25 | 23
Trading and capital losses – expiry dates up to 2032 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unrecognised deferred tax assets | £ 46 | £ 50

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_e&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_e&doctype=Standard -URIDate 2021-03-24 + Details
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