Ah so does this mean that gliders owned by the RAFGSA/RNGA/AGA are 'military' aircraft too?
lol, No I believe they come under some form of Trust. At least their gliders are registered under the CAA or BGA, so no.
Are you referring to VGS personnel here or VR(T) in general? Either way I cannot image for a second an individual holding a VR(T) commission having his commission transferred to the active reserve for temporary mobilisation unless he/she has a specific skill that the RAF could utilise in a commissioned capacity.
Na, I'm being general since the VR(T) commission (speaking loosly) is much the same for all areas of it. Obviously (using the full abilities of common sence) we would need some form of all out war before steps to be taken. But I understand it is possible.