Battlefront features the Mark A Whippet Tank for Great War
Battlefront takes a look at the Whippet (whippet good) tank for Great War in this article.
From the post:
While the Mark I and later the Mark IV tanks were excellent infantry support weapons, and could even create a substantial breach in an enemy line when used in numbers, they lacked the speed to exploit that gap. In late 1916, William Tritton proposed a faster vehicle to the Landships Committee which would be capable of filling this role on the battlefield.