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Accounting information and policies - Principal foreign exchange rates used in translation of financial statements (Details) | 12 Months Ended
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Jun. 30, 2022 $ / £ € / £ | Jun. 30, 2021 $ / £ € / £ | Jun. 30, 2020 € / £ $ / £
US dollar |  |  |
Foreign exchange rates [abstract] |  |  |
Income statement and cash flows | $ / £ | 1.33 | 1.35 | 1.26
Assets and liabilities | $ / £ | 1.21 | 1.39 | 1.23
Euro |  |  |
Foreign exchange rates [abstract] |  |  |
Income statement and cash flows | € / £ | 1.18 | 1.13 | 1.14
Assets and liabilities | € / £ | 1.16 | 1.17 | 1.09

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- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- References No definition available. + Details
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- Details
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- Details
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