This is an image a Whippet in a Museum today:
The Mark A/Whippet was a British tank of World War I.
. Faster than the earlier, heavy tanks, the Whippet was a cavalry style weapon. It used mobility and speed in making any break in the enemy lines.
It was possibly the most successful British tank of World War I, the Whippet was responsible for more German casualties than any other British tank of the war.