Boltar ) gurgled happily, sounding much like they
were saying :

I saw on TV not long ago something about Hybrid buses being used in
London - not those hopeless fuel cell things but a diesel engine plus
electric motor. Are these out and about yet?

February 2006.
http://www.tfl.gov.uk/corporate/medi...ntre/3680.aspx

And double-deckers since November 2006.
http://news.bbc.co.uk/1/hi/england/london/6102806.stm