It was reported on this site yesterday.
This is the news report that triggered it
http://www.telegraph.co.uk/news/201...for-obese-cures-half-of-diabetes-cases-study/
May i suggest you search the PHE blogsite yourself, since I cannot be ^^^^^ed to do it again There is a technical paper in the blogs section, but it does not call it bariatric, Nor gastric band. But it is clear from the contents what it is describing. Since I am not myself interested in this procedure, I did not save the chapter and verse.
Good Luck.