From The Evening Standard:
Pro-Europe MPs served the threat of a pricier pint a day after Tory eurosceptics claimed that chicken tikka masala would taste better in an independent UK.
Lucy Thomas, from Britain Stronger in Europe, said: “The cost of everyday items is lower in London because of the EU. Trading freely across Europe means cheaper goods and services ... whether you’re buying a pint or booking a flight. If we left Europe then UK pubs may have to pay a higher tariff to buy in beer from France, Belgium, or Germany. Let’s make sure we avoid that hangover.”
However, Tory MP Paul Scully scorned the claim. He said: “I don’t see us losing access to the single market because European brewers will still want to export their beers. Competition would keep prices low and restaurants and pubs could knock off the cost of EU red tape, which would be something to celebrate.”
Above and beyond that, (nearly) half the cost of a pint in the pub is Beer Duty and VAT, which an independent Britain would be able to increase or reduce to suit itself. The actual price of beer ex-duty is almost irrelevant. And there are plenty of bansturbators who want beer to cost more anyway, so from their point of view, a price rise would be A Good Thing.