"Ground crews of No 300 (Polish) Squadron RAF work on their Vickers Wellington Mk Xs at Hemswell in Lincolnshire, as another aircraft makes a low pass over the flight line, 17 June 1943." Ground crews of No 300 Polish Bomber Squadron RAF work on their Vickers Wellington Mark Xs at Hemswell, Lincolnshire, as another aircraft of the Squadron makes a low pass over the flight line. 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.