Yeah in the UK breakfast and dinner should be fine. Eggs and bacon are common for breakfast, and for dinner you can have a meat and veg meal and skip the carb element. Lunches are a bit more of a challenge if you are not cooking. I live in the UK, and have found some supermarkets (e.g Marks and Spencer) do low carb snacks like salami, cheese, humus and carrot dips, salad boxes (sadly many with pasta in) and cooked chicken pieces. If you find a pub that serves hot food for lunch you can probably find something that's not too bad. Some sandwich shops in the larger centres do salad boxes that they will make up for you. Depends quite a lot on where in the country you are. I live in London so have a gastronomic feast on my door step, but recent I travelled to a village and had trouble finding somewhere for lunch that didn't involve eggs and bacon (after having already had eggs and bacon for breakfast).