I know this is a U.S. built tank, but since it is in British markings with a British designed top turret I decided to put it here.
A much-maligned design, it was never more than a stopgap until the M4 Sherman could reach the field in substantial numbers. Yet it served in quantity itself throughout the world, especially in North Africa, the Soviet Union and then the Pacific, and its appearance at Gazala in 1942 was a profound shock to the Axis. Soon after, it would amass a reputation as a poorly-designed deathtrap, unless it had the good fortune of fighting a decidedly inferior enemy. The British' first purchase was for a modified American M3, to which they assigned the name Grant I. The major difference from the American standard was a redesigned turret, from which the commander's cupola was removed, thereby lowering the vehicle's imposing silhouette by about a foot. The British also moved the radio equipment from the hull to the turret, extending its rear with an overhang, and adding pistol ports on either side. (courtesy of http://www.avalanchepress.com)
This one is marked as a tank assigned to the 7th British Armored Division (Desert Rats).