Hiya Juleslee
I was down to have a gastric band on NHS and all in all it would have taken around 18 months,
Firstly i was referred to a bariatric specialist and him and his team held a seminar, basically to explain about all the procedures they offer, if this doenst put you off, they then call you back for your first appointment, around 4-6 months later, at this appointment your asked a series of questions relating to your health, sleep, diet etc, if they are happy to proceed then your seen at the same appointment by a dietician, my dietician gave me a goal of to lose 2kilos for my next appointment....I know it sound daft, as your there because your struggling to lose weight, they want to see you helping yourself at trying to lose the weight,
I struggle to lose weight because of a medical condition, but I had two appointments where i lost more than the little goal they set, by counting calories. I was then referred to see a diet psychologist who specialises in finding out the reasons why your overweight and the relationship you have with food, not sure if this will work for you as you put it on through medication.
The psychologist asked if i would try the gastric balloon to see if i could lose weight with that initially before going under the knife and having the lapband fitted, so i agreed, now thats the stage i am at, we were initially told upto 18 months, but because there is more and more going in for bypass/lapband surgeries, the wait could take up to 24 months, but your not left, they frequently give you appointments to keep a check on you.
I hope that helps.