My hospital seems to be a bit different.
I was referred by my G.P but after I had tried other methods of weightloss. I had to attend a seminar and have my weight recorded. The first appointment was with the dietician and nurse, where we discussed the type of surgery and was given a target weightloss I had to meet before my next appointment which was with the consultant. In the meantime, I had to have a sleep test to rule out sleep apnoea. My appointment with the consultant was to agree the type of surgery, make sure I had met my given weight loss target and to be put on the waiting list for an endoscopy to make sure he'll not come across any unexpected problems during surgery. After my endoscopy, I'll be put on the list for surgery. During the whole process, my weight is checked, and if I gain any weight at all, I risk being moved back to the start of the whole process!
This has taken me 17 months to date, and I expect to wait around a further 9 months for my surgery, though I think my list is moving a little quicker this last couple of weeks.