I've written before about the French's government tax hike on beer (although apparently duty on beer will still be lower than in the UK). The 160 per cent rise now seems to have sparked a diplomatic stand-off between France and Belgium.
According to today's Guardian, the Belgian prime minister was rebuffed when he raised the matter with the French president and Belgium is now planning to increase duty on French wine.
Michael Jackson in his 1977 World Guide to Beer talks about the line running through Europe between beer and wine countries. The Franco-Belgian border now seems to be the main confrontation point on that line.
Surely the main effect of tit-for-tat tax increases on Belgian beer and French wine will be consumers on either side of the border crossing it on shopping and drinking trips.