Hi Chris,
I have recently PVR'd from light blue and the rules may differ from Service to service. This way it depends on where you are going. If you are jumping ship for another of the forces, the rules state that you stay on the rates you were on at the PVR point. As for FRIs, don't know. I did leave the browns to come this way in the first place and when I PVR'd then, my flying pay stayed the same. Hope this helps. Rgds from the eastern med holiday isle.