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Revenue recognition and operating segments - Revenue and non-current assets (Details) - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of geographical areas |  |  |
Revenue | £ 3,714 | £ 2,957 | £ 2,803
Non-current assets | 8,472 | 2,879 | 2,623
UK |  |  |
Disclosure of geographical areas |  |  |
Revenue | 296 | 292 | 260
Non-current assets | 192 | 180 | 176
Overseas countries |  |  |
Disclosure of geographical areas |  |  |
Revenue | 3,418 | 2,665 | 2,543
USA |  |  |
Disclosure of geographical areas |  |  |
Revenue | 1,786 | 1,240 | 1,153
Non-current assets | 7,033 | 1,768 | 1,550
France |  |  |
Disclosure of geographical areas |  |  |
Revenue | 338 | 306 | 310
Non-current assets | 268 | 234 | 249
Australia |  |  |
Disclosure of geographical areas |  |  |
Revenue | 166 | 149 | 132
Non-current assets | 132 | 120 | 114
India |  |  |
Disclosure of geographical areas |  |  |
Revenue | 58 | 54 | 49
Non-current assets | 83 | 81 | 82
Spain |  |  |
Disclosure of geographical areas |  |  |
Revenue | 56 | 46 | 44
Non-current assets | 76 | 42 | 41
Other Countries |  |  |
Disclosure of geographical areas |  |  |
Revenue | 1,014 | 870 | 855
Non-current assets | £ 688 | £ 454 | £ 411

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- Definition The amount of non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Financial instruments, class [member]; Non-current assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 33 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_33_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_114&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2023-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2023-en-r&anchor=para_113_a&doctype=Standard -URIDate 2023-03-23 + Details
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