After trying various diets, and gaining it all back PLUS (!), I've now started the 5:2 Fast Diet, using the book by Michael Mosley. Today is my #4 Fast Day (500 calories). After being on the diet for a week and a half, I've lost 5.6 lbs and am happy as a clam! The Fast Days are not nearly so difficult as I expected, and I've found that I'm just generally less hungry on non-Fast Days, for some odd reason.