This vehicle is adapted to tackle rough, muddy terrain and was designed by Cuthbertson & Sons of Scotland. Derived from a Series II long wheelbase, minus wheels but with a sub-frame, it used a track fixed around bogeys at each corner driven by a sprocket on the Land Rover’s hubs.

The front tracks are steerable in the conventional way but, when four-wheel drive is engaged, each track is powered with different motion. This stops the side to side scrubbing of the tracks when turning which tends to happen on conventional tracked vehicles. The very high ground clearance makes it well-suited to marshy ground, although its poor climbing ability makes some operations, such as scaling the banks of a riverbed, difficult.