That's amazing. Well done! You'll probably find that the losses slow down a bit after the first couple of weeks (otherwise you'll end up looking like a wrinkly prune!) but if you keep at it you'll have a steady weight loss that is much better than with most diets.
I know, I did Cambridge a few years back, lost four stone, kept most of it off, then fell pregnant! Little boys almost four months so trying to lose the baby weight now!