I don't really know how much is the diet and how much is the exercise although most research done points to it being a bit of both. Hopefully once I get to my target weight I can go back to eating the normal 2000 calories every day and as long as I keep up with the exercise I can keep to that weight as well as maintaining a good level of fitness.
Here is a breakdown since starting the diet:
February - Weight=11st6lb BMI=28.2 BodyFat=39.9%
March - Weight=11st8lb BMI=28.7 BodyFat=41.1%
April - Weight=11st4lb BMI=27.7 BodyFat=39.1%
May - Weight=10st13lb BMI=26.9 BodyFat=39.6%