Cosmetic surgery is not carried out on the NHS. What is called cosmetic surgery - actually, reconstructive or plastic, is very, very tightly controlled on the NHS and oonly available to those who have a deformity or severe disfigurment.
Believe me, I know - my mum was told I needed reconstructive surgery to correct a deformity when I was two. I had to see the consultant regularly for 4 years, have dozens of 'conservative' treatments and only then - seventeen years later, after first being
told I needed surgery, and 4 years after I was told I was being refered to get the op, was I accepted.
That was for, in my GP's words 'a rare and severe' issue that affected my functioning and has left me with permanent damage to my bladder. Because the operation could be deemed as cosmetice they had to treat it that way.
It is certainly not easy to have surgery that could be deemed 'cosmetic' on the NHS, probably rightly so - although I do think it should be obvious where severe problems exist and it should be easier for them to get help.
Braces wise, if the issue is not severe it seems only right that there should be a charge of sorts. Only when it poses a significant risk t health or a severe lack of functioning should it be done on the NHS.