Would the NHS complete surgery on Festoons?

I've read that Festoon surgery is really tricky. I read if you want eye bag removal, upper and lower and have Festoons a specialist surgeon would be needed to complete all together. I've read this is a medical condition, not cosmetic? I have had three previous surgeries and at least for two I have had an eye clamp used. I believe this has increased this condition, not sure why this has happened over the past 12 months.