The Mechanization Board wanted a "heavy" cruiser tank to be constructed.
The Cruiser Mk V Covenanter was inspired by Russian T-28 and based on the A13 Mk II.
The Cruiser Mk V used an epicyclic steering system which was better than the clutch and brake system.
The driver's position was moved to the right side and the radiators for the engine were located in the front on the left side. A flatter engine was installed to lower it's height, but this caused it's cooling system to not work. These problems weren't discovered until it was already been in production.
The turret floor was smaller than the turret ring and this caused the gunner to sit in an uncomfortable position and the commander risked getting his legs trapped when the turret was rotated.