Hi Flumpy, Well done for getting to a BMI of 25.
That's good advice from KD. You don't want to lose muscle mass. I saw a friend do this on LL and she looked guant. She looked much better once it went back on and was a stone back up.
I would call the Exante team and ask them for their advice on losing on the simple plan. To be honest if you were calorie counting you would still lose on 1200 cals, so I don't see why you wont on the simple solution.
Will be interested to hear how you get on with it Flumpy, as I was thinking of doing Simple when I get to my last stone to go. Keep me posted.