In a word (or three actually) Disability Discrimination Act
O&G UK examining Doctors wary of refusing a Medical Cert due to patient being too fat, BMI over 40 then get the 'you must lose weight' instruction then sent for the dubious 'can you get into a survival suit and can you fit through this huge escape window', if they pass that then off they go for another two years to get even fatter
Full Breakfast and stickies anyone ??????????