In the UK there are almost no low carb snacks to eat on the go. None! Go to a train station and the only thing you'll find is chocolate, crisps and maybe some sandwiches. And on the train it is even worse. Pastries, more chocolate, BLT's - but not even a single piece of fruit. It's impossible to be on a low carb diet while traveling on a UK train unless you bring your own food. In fact, I think it is impossible to be on any type of diet on the train. Not cool.