When the Germans realized what a threat tanks could be, they made their trenches wider to trap them; one answer to this was to build longer tanks and the Mark V was stretched by six feet to create the Mark V*. As an interim solution this was adequate but a further improved version, the Mark V** was designed for 1919.

Find out more about the First World War on the Tank Museum’s Centenary blog, Tank 100 http://www.tank100.com