Hello!
Just wanted to say good luck and keep focused.
I was over 15 stone in 2011 and I lost the odd stone here and there until June 2012 when I did 7 weeks SS with Cambridge. It was not fun and it was very difficult but it absolutely did the job! I was 10 stone by September 2012 and I then lost a further stone by calorie counting / no snacking and moderate carbing! I've been at my goal weight of 9 stone 5 ish for about 19 months now.
The best advice I could pass on to you would be to start planning your maintenance now. Decide how you'll keep this weight off once you've lost it. It's what has made all the difference to me and the reason why I've not put the weight back on. ( I am strict during the week, I eat three times a day and never snack and come the weekend I eat whatever I fancy. Combined with regular exercise, this does the trick )
I lived on the mint crunch bars, mint choc and fruits of the forest shakes and err that was it whilst doing my 7 weeks. If you stick to it 100% and don't cheat, you will be 12 stone something in May, no problem at all. And the time will pass regardless of whether you're dieting or not so may as well make the most of it.
Do shout if you want any hints or tips. I became quite the expert in those 7 weeks : )