Of course there was only one way to find out... and it’s still a mystery. Very wisely they avoid talking much about the actual beer and seem to concentrate on music and football. Although we do learn that they’ve been using British barley for 30 years. No mention of what they used before, I note. Still, nothing too exciting and I can only put its success down to the “Google effect.”
The Carling page on Wikipedia used to be quite funny, with them getting the blame for the decline in male fertility. Sadly, now it reads just like an advert.