A trade badge is worn on right upper sleeve by the rank and file only. 
A skill at arms badge like the cross flags of a signaller or the winged wheel of a Motorcyclist or dispatch rider are worn on the left forearm. Likewise a Machine gunner or Bren Carrier driver is not a trade but a skill at arms.  Ron
		 
		
		
		
		
		
		
		
		
	
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