""wrens" Do Maintenance work at Naval Air Station. 4 March 1943, Royal Naval Air Station, Stretton, Lancs. Wrns Are Now Doing Maintenance work at the Aerodromes Where Fleet Air Arm Planes Are Overhauled. They Check Over Planes When They Arrive Or Leave To Ensure That Each One Has Its Correct Equipment, Do Gunnery Maintenance and Photographic Work." A Wren checker in the cockpit of an airplane.