Number group		Front design		Designators		Earliest known date	
	
			--------------------------------------------------------------------------------------------
	
			83,000,001		Bus - Handy Hints	T-d1 to T-d4		December 2009
			    to 
			83,100,000

			83,100,001		Bus - Handy Hints	T-d1 to T-d4		January 2010
			    to									
			83,200,000

			83,200,001		Not seen as yet		(by 11/2010)
			    to									
			83,300,000

			83,300,001		Bus - Handy Hints	T-d1 to T-d4		March 2010
			    to
			83,400,000

			83,400,001		Not seen as yet		(by 11/2010)
			    to
			83,500,000

			83,500,001		Bus - Handy Hints	T-d1 to T-d4		August 2010
			    to						and T-a1 to T-a4	June 2010						
			83,600,000

			83,600,001		Bus - Handy Hints	T-a1 to T-a4		July 2010
			    to
			83,700,000

			83,700,001		Bus - Handy Hints	T-a1 to T-a4		September 2010
			    to
			83,800,000

			83,800,001		Bus - Handy Hints	T-a1 to T-a4		June 2010
			    to 
			83,900,000
	
			83,900,001		Bus - Handy Hints	T-a1 to T-a4		June 2010
			    to
			84,000,000