Roundshaw is a housing estate and park in south Wallington on the eastern edge of the London Borough of Sutton. Grid Ref TQ302633. Roundshaw was built on part of the site of the former Croydon Airport, and occupies the area which once stood the buildings of the first Croydon Aerodrome (the 'Plough Lane' aerodrome) which was demolished in 1928. More information on the Wikipedia page [1]