Crossing Westminster Bridge, TE920 (LK58KFW) was participating in the Year of the Bus Parade in June 2014. Not immediately obvious is that the rear half of the bus is wrapped to promote access to live bus arrival times.
Picture ref A3396
Later in the day TE920 was on display in Regent Street in the static Year of the Bus display, a fuel cell Wright bus can be seen beyond.
Picture ref A3455
Enviro400 TE941 (LK58KHF) was seen in Baker Street in May 2015 with special silver Borismaster LT190 (LTZ1190).
Picture ref A7550
Having been the first to embrace the Enviro400 for operation in London, Metroline was also in the vanguard with the hybrid version, the Enviro400H. Seen in Maida Vale on the 16 in summer 2012 is TEH915 (SN08AAO) sporting the original hybrid livery used London wide with a sprinkling of green leaves and - notice - no mention of Metroline!
Seen a couple of weeks earlier in May in Victoria is sister vehicle TEH916 (LK58CPN).