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Embleem PVC met klittenband aan de achterzijde The air forces of the United Kingdom – the Royal Navy ()'s Fleet Air Arm (), the Army's Army Air Corps () and the Royal Air Force () use a roundel (), a circular () identification mark, painted on aircraft () to identify them to other aircraft and ground forces. In one form or another, it has been used on British military aircraft from 1915 () to the present.