The subjects of 5:2 diets and fasting come up on this blog from time to time, so perhaps some of you might find this interesting (if you haven't already seen it).
bbc.co.uk/news/magazine-255...
I loved the comment about the the body "craves what it expects". Which I guess is why it takes time to shake off those 'bad' eating habits.
Good luck with your weight loss efforts, folks.