33 with 4 stone to lose

Hi there, I've got considerably more to loose then you but I know you pain as I too am very successful at failing on my diets. You know what I like most about MFP, it's not a diet. I've been doing this for 3 weeks now and I don't actually feel any different than before I just have a greater understanding of the calories I put in my mouth. We all know we're supposed to eat 2000 at most but I had no idea what 2000 looked like. It helped me to question whether I'm choosing the right food and question my portion size and now that I have felt motivated to eat less in one go I'm finding I didn't need to eat that size in the first place. I can eat, chinese takeout and biscuits and chocolate and anything else I want, it just doesn't have to be a king size bar or a whole packet. I hope you get on as well as I have.

If you are committed and dedicated, you will lose weight and you will not fail. It's as simple as that :]
Stick with MFP to help you with that willpower but ultimately, it's down to you. Ask yourself how much you want this. If you are willing to work for your goals, you'll get there. Wishing you very best of luck!