White Waltham Airfield is an operational general aviation aerodrome located at White Waltham, southwest of Maidenhead, in the Royal Borough of Windsor and Maidenhead in Berkshire, England. This large grass airfield is best known for its association with the Air Transport Auxiliary from 1940-1945 and also has a significant history of pre-war flying training, war-time and post-war RAF use and post-war use as flight test centre by the Fairey and Westland aircraft companies. It is now privately owned and is the home of the West London Aero Club, the largest flying club [citation needed] in the United Kingdom.