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No. IN the UK the sale of alcohol act does not cover such drinks as Pimms. They may be sold in any volume

James Pimm first produced Pimms in 1823. It was not until 1853 that the beverage went into mass production. Despite the business being sold on in 1865, the drink retained the Pimms name and brand, which it still does now.

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Pimms has 156 Calories per 100ml so 25 ml will have 40 calories - that's just the pimms, not the mixer added. Source from diageo website

http://www.knowyourdiageodrink.com/en-row/Product%20Information/resultspage.html?BrandId=5144&VariantId=23955