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Formed on 29 August 1940[2] at RAF Church Fenton, the squadron inherited the traditions, along with the emblem and a large part of the initial crew, of the pre-war Polish Torunian Fighter Squadron. The bear climbing a tree (Coat of arms of Madrid) was an emblem of the No. 605 (County of Warwick) Squadron, the unit of the first (British) commander of the new squadron, F/Cdr. Douglas Scott.
In the course of its existence, the squadron claimed 68 confirmed kills, 16½ probable, and 26 damaged. In addition, the crews of the 306 brought down 59 V1 flying bombs. It was disbanded on 6 January 1947[2] after the end of World War II.
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