My opinion, it's a civilian L/Rover made to look like an S2A GS, the give away for me, is the front dumb irons are not extended, I can't see the rear (front rear mount) either but it has just had a lot of bolt on items put on it, just my threepence worth, any good enthusiast would pick it out quickly, the chassis number listed is not S2 C/R related either, cheers Dennis