Would it be possible to loose 2 stone in 3 months by following a healthy eating plan and exercising for an hour 4 times a week?
Have you actually read any of the replies you've had?? You don't need to lose 2 and half stone, that would make you dangerously underweight. Can you not take this on board? I very much doubt that any healthy eating plan would allow someone of your weight to lose that much in 3 months anyway.