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Acquisition and sale of businesses and brands and purchase of non-controlling interests - Acquisitions in the year (Details) - GBP (£) £ in Millions | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Jun. 30, 2020
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Disclosure of detailed information about business combination [line items] |  |  |  |
Cash consideration paid | £ (88) |  | £ (358) | £ (27)
Deferred consideration payable |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Deferred/contingent consideration payable | 4 |  | 2 | £ 0
Other businesses acquired |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Cash consideration paid | (26) |  | (95) |
Other businesses acquired | Maximum |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Maximum value for contingent consideration payments | (18) |  | (86) |
Other businesses acquired | Deferred consideration payable |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Deferred/contingent consideration payable | £ 4 |  | £ 2 |
21Seeds |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Percentage of interest acquired |  | 100.00% |  |
Cash consideration paid |  | £ (62) |  |
21Seeds | Maximum |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Maximum value for contingent consideration payments |  | £ (61) |  |

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- Definition The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f_i&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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- Definition The fair value, at acquisition date, of liabilities incurred (for example, a liability for contingent consideration) as consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f_iii&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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