Attached to Coastal Command the unit flew reconnaissance and air-sea rescue missions, anti-shipping strikes, and anti-submarine patrols.
86 Squadron was first formed on 1 September 1917, but was not yet operational when it was disbanded on 4 July 1918 to provide reinforcements for active units in France.
[3] The squadron was reformed on 6 December 1940, initially flying Bristol Blenheim light bombers on convoy escort duties.
After flying reconnaissance and air-sea rescue missions for three months the squadron started anti-shipping strikes, with the first torpedo bomber operation taking place on 12 December.
[3] In March 1942 the Squadron moved to northern Scotland to engage in patrols and strikes on the Norwegian coast, before being converted to the Consolidated Liberator by early 1943.