Roland Perry gurgled happily, sounding much like they
were saying:

The lump I saw at the back on top of a single decker in some
picture. I presume its the battery pack. Perhaps double deckers can
fit it in elsewhere.

http://citytransport.info/Digi/4690a.jpg

Do stop trying to get one over everyone else all the time. You often
end up looking silly.

That's right, Bloaty. It's me that looks silly after you mentioned not
having seen any hybrid buses, because they didn't have lumps on the
roof. Oh, look. I look so silly having posted a pic of one of the
hybrids in service in London - without a hump on the roof. Yes, silly
me.

A five year old hybrid bus seems a bit unlikely. What sort of
modifications does it have?

A quick google for the plate suggests it's perfectly legit.

http://www.buslistsontheweb.co.uk/year/year.asp?
Year=55&Type=9&MenuType=Year&ManuSub=&PageNo=2

Search that page for the plate - LX55EAG. It's one of the first batch of
six hybrids - Wright Electrocities delivered between Dec '05 and Feb '06,
from an order placed in March '05 - there seems to have been at least
one later batch of those.
http://www.busandcoach.com/newspage....2&categoryid=0
http://en.wikipedia.org/wiki/Wright_Electrocity
http://en.wikipedia.org/wiki/Hybrid_buses_in_London