<qa>  What is the current recommendation for gastric bypass surgery?Patients will be offered laparoscopic gastric bypass surgery by Mr Roger Ackroyd, in line with the current recommendation for gastric surgery according to NICE guidelines i.e. patients with a BMI over 40 or a BMI over 35 with at least one co-morbidity. Patients will be reviewed monthly for six months. At each visit the following will be recorded: 