Claribella

Hi, I'm new to this to please bare with me! Ok, i weigh 19 stone, am 5'6 and am only 22 years old. I have recently been reffered by my G.P for a gastric band. I'm worried it will be denyed as there is only an allowance of 12 people per year in this country who can have funded surgery. Has anyonne had experience with the NHS and what it involves? My GP was very reluctant to acctually reffer me, but after two years of trying every method known to man, I failed yet again. I'm also very interested to know about the sagging skin. As I hope to be my goal weight by 24 will I experience skin sagging? If i excersize a lot after the band will that tighten my skin up?
Any info would be great! Thanks x x x xClaire