Onwell,
I joined NATS straight from school, as did many others I know, so university is by no means required. However, you need to really think about your own character. You need to ask yourself if you're mature, if you have a lot of common sense. If you think you might benefit from the 'life experience' of going to university, then perhaps that would stand you in good stead if you apply a few years down the road.
NATS trainees have to sort out their own living arrangements (none is provided), and moving out of home for the first time can be daunting (but not impossible...again, it's what I did).
Just some advice, the Mods on PPRuNe tend to take a dim view of 'mobile phone speak'.
