The UK brewing industry has discovered a magic number. Foster’s, John Smith’s, Carlsberg, Coors Light, Sol, Grolsch, Greene King IPA, and now Molson Coors’ new Caffrey’s Black Stout have all reformulated to exactly 3.4% ABV. They’ll tell you it’s about your health and ‘balanced lifestyles.’ We’ll show you it’s about the duty threshold at 3.5% that saves them 11p per pint. John Smith’s pocketed £14.5 million while raising keg prices. Use our calculator to see what your local is really worth