Definitely try to make your own food, as it'll also work out cheaper.
There are a large range of gluten free foods (eg Sainsbury's Free From range) but they're a bit more expensive than the regular stuff, and the loaves of bread are tiny. However, if you have a breadmaker, you can get the speciality flour and make your own bread.
It'll take a little while to get used to organising it all, but once you're into the routine, it'll be a doddle.
And, when you go out to a restaurant, you can request that they prepare a meal in a slightly different way - eg leaving a sauce off to avoid the flour in the sauce, and they'll usually be ok with it.