Wrens learning to be aircraft mechanics and radio operators at Naval base.
HMS Heron, Royal Navy base at Yeovilton.
L/S of aeroplane on airstrip. Various shots group of Wrens (WRNS - Women's Royal Navy Service) studying aeroplane engine with male instructor. L/S of aeroplane on airstrip. M/S of instructor showing underneath of aeroplane to some Wrens. C/U Wren officer.
Various shots of Wrens folding wings of Firefly fighter plane so it can be moved into hangar. Various shots Wren climbing into cockpit of plane. She examines the instruments and then gives thumbs-up sign. She then tests the plane's propeller.
Various shots Wrens doing scientific experiments. They are estimating upper air currents using weather balloons.
Various shots WRNS radio mechanics installing radio into aeroplane. A male pilot gets into plane, a Wren shuts the cockpit and the plane takes off. Another Wren on ground signals to pilot. L/S plane flying low. C/U Wren radio operator. L/S plane in flight.