@Jillyfl You've had a variety of detailed responses to your question, so I won't add to those, but I do have a suggestion that you ask yourself , what I consider to be important questions, before you decide what to do. I adding these questions here, I'm not asking you to respond "out loud", but just to consider them and answer for yourself truthfull, because, to an extent these two questions are fairly pivotal in the decision making process.
The first question is to ask yourself about your relationship with food. Is food addictive for you, and maybe particularly, are carbs addictive for you. There's absolutely no shame in admiting they are addictive to you, because it's very, very common indeed. Whatever an individual's addicition is, they usually find it hard to stop once they start, with whatever they're eating, or simply be drawn back to that taste/sensation hit time and again.
If the honest answer to that is that they are, then the second question becomes even more critical. If you elect to take your eye off the ball, will you be able to get back on track in a timely manner, at home. Some can, and some asmit the alien location, then returning to a more usual routine makes it easier. In other words they'll not ba "exposed to" the same temptations at home, but let's face it, there's very little to eat in Italy (or anywhere else for that matter), that can't be obtained in UK, and if your addicition is to bread, pasta, icecream, then those options are present in every supermarket you go into.
At the moment you say, farily clearly, in my view, that you currently resent your way of eating. Will you resent it more or less, when you have tasted the manna from heaven, whatever that is.
OK, that would be three questions, but I've never been a less is more girl.