This is the second book in the new series about Polish army vehicles. It tells the story of four major tanks of British origin used by the Polish army in the 1930s, some still in use at the time of the German invasion of 1939. Polish designers modified the original Vickers tanks by replacing the engines and improving the armoured protection. Training and operations with these tanks is described and illustrated in many photographs and full colour artwork. The colour schemes and markings are also described and illustrated.