"The Polish Air Force in Britain, 1940-1947" Ground crews of No. 300 Polish Bomber Squadron working on their Vickers Wellington Mark Xs at Hemswell, Lincolnshire, as another aircraft of the Squadron makes a low pass over the flight line, 17 June 1943. Note different positions of the Polish Air Force chessboards on the aircraft in front, embelished with a dwarf image, and BH-E behind, and the low vision code letters, improving the night camouflage of the bombers.