Tactical recognition flash (TRF) is the official British military term for a coloured patch worn on the right arm of combat clothing by members of the Royal Navy, British Army and Royal Air Force. A TRF serves to quickly identify the regiment or corps of the wearer, in the absence of a cap badge. It is similar to but distinct from the DZ Flashes worn by members of Airborne Forces.
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TRFs should not be confused with formation signs or insignia, which are used to denote the formation (usually brigade or division or a higher headquarters) and are worn in addition to TRFs by a member of any regiment or corps serving in that formation.
Naval Service
In 2007, the Royal Navy introduced a TRF, the RN corporate logo. This short lived idea was abolished in late 2008 by a decision of the Naval Service Clothing Committee, along with the large "Royal Navy" breast patch, and replaced by a curved shoulder patch with the same wording.
Colonial Forces
Royal Gibraltar Regiment