I'm off on another international trip - this time to India. I haven't been there before but, like most Brits, I enjoy Indian food so I'm kind of looking forward to trying the real thing. I say "kind of" because one of the side-effects of Indian food can be what is known in the trade as Delhi-belly, or the rampant shits. I don't have many preconceptions about India - experiences from colleagues vary from the man who went for two weeks and never had even a mildly bad gastric experience to the woman who spent the entire return journey in the bathroom on a 747, praying for death.