I haven't posted on here before, but I'm very happy because I've been on a healthy eating and exercise programme for the last 4 weeks and have so far lost 2.3 kg. I get weighed again tomorrow, so may have lost even more. The encouraging thing is that I stayed the same even last week, when I'd made very little effort, because of being involved in a conference all day Monday, Tuesday and Wednesday, although I suppose that at least gave me no opportunity for nibbling!
It's not a diet as such, but it suits me and it's obviously working. I've cut my portion sizes and I'm walking almost everywhere, except for days like Saturday, when I had to go out and I got soaked just walking to the bus stop and back twice.
Incidentally, I know some people on here do 5:2. We had a session on what they call fad diets a couple of weeks ago, where such things were discussed. They advised against it (and most others, including Weight Watchers, Diet Chef and the like). The main reason seemed to be that it is not the healthiest way to diet - the programme's run in conjunction with the BHF - and less sustainable in the long run than lifestyle changes.
But if it works for you, that's fine.
I did get down to my target weight at Weight Watchers once many years ago, but I found it was unsustainable in the long-term. To me, it was half a stone lighter than my most comfortable weight.