Guru,
I am the same height as you and I weigh 1 lb more than you and started 22 lb heavier than you 4 weeks ago, I see the reason you say you have 11 stone to lose is because you want to be 10st 7lb....it's great to set yourself a goal, but, I personally think you should set yourself lots of small goals and decide when you reach the smaller goals if you still want to get to the original goal set. I have decided I want to get down to 13 stone by Christmas...once I have reached that goal I will then decide if I am happy at that weight or decide whether I should lose more. I know personally if I got to your goal weight I wouldn't look or feel right. You also might get to 11 or 12 stone and think enough is enough, don't put too much pressure on yourself this diet is hard enough mentally as it is.
Good luck on your weight loss journey and remember it is your journey and no one else can tell you what to do, but please don't keep thinking about the numbers in your head as you will be continuously daunted by the whole process...just take each day at a time...remember small steps. "aim for the moon and you might land among the stars." Good luck and i'll keep posting and we can support each other.