The Engineering and Supplies departments of the GPO, respectively the Green Fleet and the Red Fleet, comprised mostly of heavily modified ex-MOD vehicles. Their appearance was archaic even for their time but incredibly were still at work into the mid-sixties putting in a good days work despite their age. Here at a GPO depot an ex-Army Foden DG waits for its next load and in the background a post war AEC Matador one of 29 modified as 4×2 tractor units specially for the GPO is parked.