It's like any diet, some people maintain and some people don't. If you don't tackle the issues behind your weight gain and you go back to your old eating habits, you'll regain the weight because those habits will make you fat again just as they did before.
If you use this journey as a chance to address your eating issues - and you'll have to, because you'll have to find substitutes for whatever you were getting from excess food - if you embrace the refeed programme and are determined to make healthy food choices for the rest of your life, you will keep the weight off.
I don't intend to binge after LT. I intend to eat healthily 99 per cent of the time, with the odd treat or meal out. I won't feel guilty about those meals the way I always used to - but I will make up for them elsewhere. I am going to give myself a 5 pound buffer zone either side of my target weight - if I hit it, serious action will have to be taken!