David Cameron please make it mandatory to label all alcohol vegetarian or non vegetarian

In the UK alcohol is not labeled whether it is vegetarian or not. Many cider beer wine and spirits contain animal ingredients and many vegetarians are completely understand aware.
Vegetarians have as much right as any to consume alcohol and it is extremely difficult to keep up with what they can and can't consume. It is extremely distressing for vegetarians to find out they have consumed dead innocent animals and as it is such a serious issue many vegetarians would rather not drink at all.
Please sign to make alcohol labelled to make it clear to vegetarians