The Polish Air Force during WWII fought in many fronts, under many different camouflage schemes and with a very large variety of aircraft. During 1939, it fought over Poland and later it became an “Air Force in exile”, fighting alongside first with the French Air Force first and the Royal Air Force later.
It should be pointed out that, while incorporated to with the RAF for operational purposes, the Polish Air Force remained an independent Air Force (hence the small checkerboard with Polish markings near the nose of the airplane) under control of the Polish Government in exile, in London. While there also were Polish pilots in the VVS (Soviet Air Force) those squadrons were not under control of the Polish Government in exile and they were effectively a regular Soviet squadron, which was staffed with individuals of Polish-origin.