In about 1925 negotiations began on the opening of a full-time aerodrome and in the late 1920s the Air Ministry constructed an airfield to the south of the town and the station which was the second permanent aerodrome to be built in Yorkshire (the first being Catterick) was opened on 29 September 1929. During the Second World War, Thornaby came under the control of 18 group, Coastal Command, before this however it had come under Flying Training, Fighter and Bomber Commands, and post-war under Reserve and Fighter Commands, at this time (post-war) it was also used by the Royal Air Force Regiment. During the war a variety of tasks were carried out from RAF Thornaby, such as, attacks on targets in Europe, anti-submarine patrols, operational training, strikes against enemy shipping, leaflet dropping and air sea rescue operations.