A large number of new Alexander Dennis Enviro200 buses was acquired for successfully won tendered operations for the Docklands Buses division. Seen in Hackney in May 2012 is SE113 (YX61BXS) on the 276.
Working the D6 on the same day outside Arriva's Hackney depot is Enviro SE125 (YX61BXA).
Also out and about on the 276 that day was SE117 (YX61BXY), also seen in Hackney.
On the 276 heading into Hackney on August 1st that year was SE130 (YX61BWF).
Back to May, and on brief layover in Hackney is SE119 (YX61BYA).