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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, 2024 £ / $ | Jun. 30, 2024 £ / $ € / $ | Jun. 30, 2023 £ / $ | Jun. 30, 2023 £ / $ € / $ | Jun. 30, 2022 £ / $ | Jun. 30, 2022 £ / $ € / $ | Jun. 30, 2024 € / $ | Jun. 30, 2023 € / $ | Jun. 30, 2022 € / $
Disclosure of foreign exchange rates [Line Items] |  |  |  |  |  |  |  |  |
Income statement and cash flows | 0.80 | 0.93 | 0.83 | 0.96 | 0.75 | 0.89 |  |  |
Assets and liabilities | 0.79 | 0.79 | 0.79 | 0.79 | 0.83 | 0.83 | 0.93 | 0.93 | 0.96

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- Definition Disclosure of foreign exchange rates. + References No definition available. + Details
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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 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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