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Material accounting policies (Details) £ in Millions	Dec. 31, 2023 GBP (£)	Dec. 31, 2022
Disclosure of geographical areas
Assumed revenue decline against base budget for six months	20.00%
Assumed revenue decline for 12 months	20.00%
Cash loss for downside scenario	£ 200
Headroom	£ 1,600
Most severe downside scenario
Disclosure of geographical areas
Assumed revenue decline for 12 months	20.00%
Cash loss for downside scenario	£ 200
Headroom	£ 1,000
Argentina
Disclosure of geographical areas
Level of price index	3,533.19	1,134.59
Ghana
Disclosure of geographical areas
Level of price index	200.50	162.80
Lebanon
Disclosure of geographical areas
Level of price index	5,978.13	2,045.46
Turkey
Disclosure of geographical areas
Level of price index	1,859.38	1,128.45

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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.

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The value of the level of the general price index used to restate financial statement information of an entity whose functional currency is the currency of a hyperinflationary economy.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 29
-IssueDate 2023-01-01
-Paragraph 39
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-URIDate 2023-03-23

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Assumed revenue decline for 12 months

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Working capital headroom

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