My experience was very different to Leda's - I was seen at St. Georges in Tooting and had my initial appointment where I was seen by the surgeon's registrar.
She explained the procedures to me and then told me that I would probably not be suitable for a bypass because I have an Ileostomy.
I was then told that a sleeve would be my best option and she went on to explain that the surgical team would meet to discuss my case and decide which procedure they would go with.
Approximately 6-7 weeks later, I was seen by the dietitian and I went through my eating habit's, how many diets I'd been on during my life, what my weight had been during different times in my life etc.
He then said that he wanted me to see a psychiatrist before I was accepted for surgery and I then waited for an appointment which took another month or two.
The psychiatrist spoke to me for about an hour and then said that he believed I was strong enough mentally for surgery and said he would be putting me forward.
I had to go back to see the dietitian which I must admit, I thought was a waste of time because he just went over the procedure and what it entailed - he also asked how I'd been and how the appointment with the psychiatrist had gone.
I waited for about three months before I heard that I'd been accepted and then it was a case of waiting for a surgery date and a pre-op assessment date.
The whole process took nine months from start to finish.