If you're applying through NATS (which I think you are?) then request contact details through HR. Normally they only allow unit visits after you passed stage 2 (at least that's how it was when I went through), simply because it takes a lot of paperwork to arrange one.
That's my experience anyway, having now been to 3 NATS airfields (2 visits I arranged myself with help through contacts HR gave me, one as part of college training).
Last edited by Crazy Voyager; 16th May 2013 at 17:13.