Hope this helps Mate
Tank, Mark V
The Mark V was the first heavy tank that could be controlled by one man, with the driver operating anepicyclic gear system designed by Major W.G. Wilson. A specially designed Ricardo engine of 150hp was used and proved reliable in service. The radiator however, was inside the tank and ventilation proved less effective than in earlier models.
In 1918, 200 Female (machine guns) and 200 Male (canon) Mark Vs were produced. The first battle in which they took part was at Flers - Courcelette.