Any Gp's On Here? 2nd opinion required

[1ststopdisco]

I suffer with septal deviation quite badly, the right hand nostril is completely blocked. 

The doctor agreed with me that I need surgery for it but told me they won’t even entertain me unless I’m a maximum of 35 BMI, ideally 30. I’m currently at 40 or 42 I believe and I’m trying to loose weight to be able to have the surgery but I cannot see anything online that suggests that I need to be a certain weight to have it done. 
 

Any GP’s on here who could offer an opinion or maybe someone who’s had it done who was over 35 BMI?