Until what age do you get free braces ?!

It is up to the age of 19 if you are stil in full time education and have genuine clinical need. They will no longer fund treatment for cosmetic need. You need to talk to your own dentist and see if you meet the criteria to get a referral.

You can be any age i think to get free braces but the space between your top and bottom teeth is what the orthodontists assess to see if you qualify for braces but i think it would be best to ask your local orthodontist or look in orthodontist specialist websites - probably the NHS

I have braces myself and they really help

You can claim it free on the NHS as long as you're still in full time education. However, sometimes dentists and orthodontists request to go privately. Not sure why.
Hope it helped :)