http://www.cranwell.raf.mod.uk/Organ...EFT/DEFTS.html
The number is in this link. They don't shout about training civilians it but they are a civvy contractor to the RAF and they do take civvy cash. They have even employed people after the course. And you get to do it in Firefly 260s and you get to dress in green and you get so see what a bit of service life look like and they have a man to fill up the plane for you and clean the windscreen and check your helmet every day - flying as it should be. (and its not massively expensive). Do it.
Tim Wooltorton was the chap to talk to