Hi Lou
Are you having your op at Salford Royal?
From GP referral to actual op probably around 18 months. After my 6 months with the dietician (ended May 09) they referred me to the surgeon.
Had my One Stop Shop appointment 6th Aug 09, my sleep apneoa test 8th Sep 09 and my psychologist app 29th Oct 09.
All my tests were fine and I went on the waiting list from the date of my last app (29th Oct). From that point there is an 18 week rule that kicks in, which basically means that your op should be completed within 18 weeks of you being added to the surgical list.
I got my phone call from Mr Ammori's secretary on Monday 18th Jan 2010 giving me 2 weeks notice that my op would be on 1st Feb 2010.
Saying all that though, they change the procedures all the time and the waiting list has a lot more people on it now than it did then. I know they are inundated with requests and the time for getting appointments for psych & sleep studies is expanding. Plus, anyone who is a more urgent case would go in front of you (don't know what the criteria is for that).
So even after the essay above I still can't give you a definative answer, you just have to jump through all the hoops and wait until they get to you.
The waiting is the hardest part and it really does feel like it's forever whilst your going through it, but once your on the other side it really won't feel that you've waited too long.
Good luck x