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v3.22.2

Financial instruments and risk management - Schedule of fluctuations in interest and exchange rates to vary from hypothetical amounts (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Impact on income statement gain/(loss) | £ 3,338 | £ 2,799 | £ 1,454
Total comprehensive gain/(loss) | £ 4,820 | 1,934 | £ 1,290
Interest rate risk |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | 0.50% |  |
Interest rate risk | 0.5% decrease in interest rates |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | (0.50%) |  |
Impact on income statement gain/(loss) | £ 13 | 13 |
Total comprehensive gain/(loss) | £ 31 | 23 |
Interest rate risk | 0.5% increase in interest rates |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | 0.50% |  |
Impact on income statement gain/(loss) | £ (13) | (13) |
Total comprehensive gain/(loss) | £ (30) | (22) |
Currency exchange risk |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | 10.00% |  |
Currency exchange risk | 10% weakening of sterling |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | (10.00%) |  |
Impact on income statement gain/(loss) | £ (33) | (32) |
Total comprehensive gain/(loss) | £ (1,125) | (1,008) |
Currency exchange risk | 10% strengthening of sterling |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Sensitivity analysis for types of market risk, percentage of reasonably possible change in risk variable | 10.00% |  |
Impact on income statement gain/(loss) | £ 28 | 27 |
Total comprehensive gain/(loss) | £ 922 | £ 825 |

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