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Financial risk management and financial instruments - Commodity Price Risk (Details) - $ / bbl | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Maximum |  |
Financial risk management and financial instruments |  |
Dated Brent Crude price | 97.92 | 124.79
Average |  |
Financial risk management and financial instruments |  |
Dated Brent Crude price | 84.74 | 87.34
Minimum |  |
Financial risk management and financial instruments |  |
Dated Brent Crude price | 73.56 | 71.70

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