|No. 251 Squadron RAF|
|Active||31 May 1918 - 30 June 1919,|
1 August 1944 - 30 October 1945
|Branch||Royal Air Force|
|Part of||RAF Coastal Command|
|Motto(s)||"However wind blows."|
|Squadron Badge heraldry||A weathercock|
|Squadron Codes||AD Aug 1944 - Oct 1945|
No. 251 Squadron RAF was first formed in August 1918 from Nos. 504, 505, 506 and 510 (Special Duty) Flights based at Hornsea but operating from Atwick, RAF Greenland Top/Stallingborough) and Owthorne. The Squadron flew anti-submarine patrols on the coast of Yorkshire for the remainder of World War I and was then disbanded on 30 June 1919.
No. 251 Squadron was then reborn after No. 1407 (Meteorological) Flight, stationed at Reykjavík, was renumbered for air-sea rescues on 1 August 1944. 1407 Flight was formed in October 1941, receiving Lockheed Hudson aircraft in April 1942. The number of aircraft was expanded in November with more Hudsons and a few Handley Page Hampdens. The latter were replaced with Lockheed Venturas in 1943.
During its first time in operation, the Squadron flew:
During its second time in operation, the Squadron flew:
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