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REVENUE AND SEGMENT INFORMATION - Analysis of revenue by product (Details) - GBP (£) £ in Millions | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Disclosure of products and services [line items] |  |
Revenue | £ 5,602 | £ 5,480
Oral Health |  |
Disclosure of products and services [line items] |  |
Revenue | 1,838 | 1,728
Vitamins, Minerals and Supplements |  |
Disclosure of products and services [line items] |  |
Revenue | 849 | 833
Pain Relief |  |
Disclosure of products and services [line items] |  |
Revenue | 1,323 | 1,286
Respiratory Health |  |
Disclosure of products and services [line items] |  |
Revenue | 850 | 893
Digestive Health |  |
Disclosure of products and services [line items] |  |
Revenue | 490 | 491
Therapeutic Skin Health and Other |  |
Disclosure of products and services [line items] |  |
Revenue | £ 252 | £ 249

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