Flying Blind if you are dead set on Air Traffic then there are still some options open to you.
In the civilian world you could try Eurocontrol because you are still young enough to try them. I think their recruitment process is very similar to NATS though.
You can also try the RAF or Royal Navy and then after a career with them try NATS but with the ATC experience you have gained. This is the route I have gone down and it worked pretty well but you have to be the type of person that will thrive in a military environment for this to work.
Good luck with which ever avenue to take.