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Financial instruments and risk management - Schedule of available undrawn committed bank facilities (Details) - GBP (£) £ in Millions | Jun. 30, 2023 | Jun. 30, 2022
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Disclosure of information about undrawn borrowing facilities [line items] |  |
Undrawn committed bank facilities | £ 2,678 | £ 2,789
Expiring within one year |  |
Disclosure of information about undrawn borrowing facilities [line items] |  |
Undrawn committed bank facilities | 99 | 793
Expiring between one and two years |  |
Disclosure of information about undrawn borrowing facilities [line items] |  |
Undrawn committed bank facilities | 496 | 103
Expiring after two years |  |
Disclosure of information about undrawn borrowing facilities [line items] |  |
Undrawn committed bank facilities | £ 2,083 | £ 1,893

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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 50 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_50_a&doctype=Standard -URIDate 2022-03-24 + Details
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