Hello and welcome.
Sorry but i have to ask this... If your gp is going to refer you for this then why do you think you are not going to fit the criteria? Surely he wouldn't send you for it if he thought they'd say no?
Plus, it really helps us if you can fill in all your details, area you're from, rough estimate on your weight etc... It's not us been nosey, one of us may be from your pct and know about the bmi etc
Do you have any comorbidities? Diabetes/sleep apnoea/hypertension etc? xx