Cuillin,
I'm about to leave the RAF and I've been applying for a number of jobs. I've just done the 'Resettlement' training you mention and I was NOT given any inside information regarding actual interview questions, copies of BA's numeric reasoning papers or any such thing! In the last 6 months though half a dozen pals have made it into Virgin or BA and I have quizzed them mercilessly about what happened - but that's as far as my exalted position of being a military bloke allows me to go to get information. They didn't have a secret inside line either and are from more than one station, but we'd all done sh!tloads of research.
As for me, I've managed to use the info I gleaned to get through the assessment day for BA and I'm now waiting for a sim date. The best place for info without doubt was the thread on PPrune! Unforunately, still a stunning silence from Virgin. But how lucky would I have to be to get a choice?!!