The Leyland Hippo Mk II was a heavy general service cargo truck used by the British Army and Royal Air Force during World War II and the immediate post-war years.

[1][2] The Leyland Hippo Mk II was a new design by Leyland, developed as a result of the planning for D-Day, which concluded that trucks with 10 long tons (10 t) cargo capacity offered considerable logistic advantages over smaller vehicles.

[1][2][3] The standard general service Hippo Mk II body was a steel framed, timber well type incorporating the wheel arches which reduced the loading height, an important consideration given most of the loading and unloading was done by hand.

Steel hoops and a canvas cover gave weather protection and prevented identification of the load by the enemy.

The sides on the latter were split horizontally, the top half expanding up to give greater roof coverage, the bottom half down to give greater floor space, multiple vehicles could be linked together to form a consolidated workshop area.