Complex sentence: In recent years, the British army has begun introducing Tactical Recognition Flashes (TRFs)-worn on the right arm of a combat uniform, this distinctive insginia denotes the wearer's regiment or corps (or sub division thereof in the case of the AGC).
Split into simpler sentences: In recent years, the British army has begun introducing Tactical Recognition Flashes-these are distinctive insignia worn on the arm of combat gear. TRFs denote the wearer's regiment or corps (or sub division thereof in the case of the AGC).