Hi, thats realy good news.you have done the milk diet before for 4 weeks, so you'll be ok.
I think they put you through it to see if you back out if the going gets tough.
My daughter (bless her) they told her she needs counceling for binge eating (this is rubbish she don't), and nhs don't fund that. Lucky enough she has some compo due soon from when she was attacked by a dog and lost the back of her leg. This is one of the reasons she needs this surgery in the first place.
Sorry for ranting on. Sue