Differential taxation

I just drank a bottle of (Belgian) Grimbergen beer that I brought back from Barcelona, where it costs about a third of what I would pay in England for the same beer. I brought back four or five bottles of Belgian and German beer, because it was so cheap. This was mainly because taxes on alcoholic drinks are much lower than in Britain, although it might also be because the Spanish have better taste in beer than many of the English. (Unfortunately it was also heavy - hence only four or five). There is something deeply absurd about all this.