Re: ATC Wannabee
Well, that thread at the top contains about all the advice relating to this subject on PPRuNe.
Try a search on NATS selection tests or NATS interview and maybe some more will appear. Beyond that, you might want to try putting in a bit of work yourself.
If you pass the first stage of selection, then the best preparation you can do is visit and centre and an aiport unit (preferrably one with its own apprach unit - like Cardiff).
Don't worry about the college course until you have a job offer, security clearance and valid medical certificate in your hands.
Good luck
VL