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Financial instruments and risk management - Schedule of financial assets and liabilities measured at fair value (Details) - GBP (£) £ in Millions	Jun. 30, 2022	Jun. 30, 2021
Valuation techniques based on observable market input (Level 2)
Disclosure of detailed information about financial instruments [line items]
Derivative assets	£ 480	£ 443
Derivative liabilities	(456)	(129)
Financial assets/(liabilities) at fair value	24	314
Valuation techniques based on unobservable market input (Level 3)
Disclosure of detailed information about financial instruments [line items]
Financial assets/(liabilities) at fair value	(403)	(440)
Financial assets - other	184	138
Financial liabilities - other	£ (587)	£ (578)

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Financial assets liabilities at fair value.

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- Definition

The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

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The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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The amount of financial assets that the entity does not separately disclose in the same statement or note. [Refer: Financial assets]

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