I have spent around 4 holidays a year traveling to London, primarily for the food and wine destinations... but why not beers?
I know that anywhere can stock a bottle of X, Y and Z; but where are the hotbeds of quality beer on tap?
I should state that I enjoy ales and whatnot at home, but my true love is Belgian. De Hems is the best place I have found so far. Also a fan of seriously hoppy IPA/Extra IPA/Quadruple IPA styles.