  the tank, cruiser, mk ii (a10), was developed alongside the a9, and was intended to be a heavier, infantry tank version of that type. in practice, it was not deemed suitable for the infantry tank role and was classified as a "heavy cruiser". ==history and specifications== the a10 was developed by sir john carden of vickers in 1934 by the adaptation of his a9 design. the a10 specification called for armour of up to  standard (the a9 was ); a speed of ) was acceptable.afv profile no. 6 p2 the two sub-turrets present on the a9 were removed, and extra armour bolted onto that already present on the front and sides of the hull, along with all faces of the turret, providing approximately twice the armour in most areas. the a10 was two tonnes heavier than the a9, but used the same 150 bhp engine, and as a consequence the tank's top speed was cut from  to . the turret armament consisted of a qf 2-pounder (40-mm) gun and a coaxial .303 vickers machine gun. for the production version there was a 7.92 mm besa machine gun mounted in the hull in a barbette to the right of the driver. this was added to give extra firepower but at the expense of simplicity - the vickers and the besa using different ammunition. the tank had a total crew of five (commander, gunner, loader, driver and hull machine gunner), and there was no separation between the driver's compartment and
Cruiser_tanks Interwar_tanks_of_the_United_Kingdom Vickers World_War_II_tanks_of_the_United_Kingdom