Introduced by the British Army in the early 1970s to replace the Bedford RL series, the MK was a development of the civilian TK 4x2 chassis. The MK has been produced with a variety of different bodies with this version depicting the tactical aircraft refueller designed for refuelling and de-fuelling helicopters and Harriers under operational conditions. Initially the MK was fitted with A Bedford 330-93 6 cylinder multi fuel engine but this was replaced in 1981 was a more powerful diesel engi