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Financial risk management - Swaps (Details) - Interest rate swap $ in Thousands | 6 Months Ended
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Dec. 31, 2023 GBP (£) USD ($) | Jun. 30, 2023 GBP (£) USD ($) | Dec. 31, 2022 GBP (£) USD ($)
Financial risk management activities |  |  |
Fair value of interest rate swaps, asset | £ | £ 2,211,000 | £ 4,173,000 | £ 4,901,000
Long position |  |  |
Financial risk management activities |  |  |
Principal value of loan outstanding | $ | 150,000 | 150,000 | 150,000
Rate received | 1 month $ SOFR | 1 month $ SOFR | 1 month $ LIBOR
Rate paid | 1.9215% | 1.9215% | 2.032%

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- Definition The average rate of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 23B -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 23B -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 24A -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24A_d&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Rate received for a hedging instrument + References No definition available. + Details
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- Details
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- Details
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