No 250 Squadron was formed on 10 May 1918 at Padstow from Nos.494, 500, 501, 502 and 503 Flights for coastal reconnaissance duties over the Bristol Channel and its approaches. Equipped with a mixture of D.H.6s and D.H.9s, it flew anti-submarine patrols until the Armistice and disbanded on 31 May 1919.