Seen in April 2012 New World First Bus Alexander Dennis Enviro500 4025 (PE5898) is approaching Causeway Bay on the 23. Built in 2010 it is 11.3m long.
Just over four years later 2011 Enviro500 5533 (PU8554) is in the Macau Ferry Bus Station. Numbered in the 5000 series, the 2011 build bus is 12 metres long.
Picture ref B3072
Back to April 2012 and Enviro500 4022 (PD9206) is another on the 23 in evening traffic.
The following day 4022 is seen at North Point with a Citybus Northen Counties, originally Plaxton badged, Volvo Olympian 601 (HJ5152) which has mounted the kerb for some reason.
Alexander Dennis Enviro500 5505 (NF5206) dating from 2008 is seen in North Point in April 2012.