No. 235 Squadron RAF was formed at Newlyn, Cornwall on 20 August 1918 from the former No. 424 and 425 flights RNAS, and was equipped with Short 184 seaplanes for anti-submarine patrols. It flew these until the Armistice on 11 November 1918. The squadron disbanded three months later, on 22 February 1919.
It reformed at RAF Manston on 30 October 1939 as a fighter squadron, but was equipped at first with Fairey Battle light bombers for training purposes, which were in February 1940 replaced by Bristol Blenheims. The squadron then transferred to Coastal Command and later moved RAF Dyce in June 1941. In December 1941 the squadron began re-equipping with the Bristol Beaufighter, and in May 1942 moved to RAF Docking. In July 1942 the squadron moved to RAF Chivenor, and then returned to Scotland in January 1943. In August 1943 the squadron returned again to South West England, in preparation for the D-Day landings, later operating Atlantic anti-submarine patrols from RAF St Angelo in Northern Ireland. The squadron re-equipped in June 1944  with the de Havilland Mosquito and moved to Banff in September 1944, joining the "Banff Strike Wing". The squadron disbanded on 10 July 1945.
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