Rod gurgled happily, sounding much like they were
saying:

http://www.ft.com/cms/s/0/7f2f081e-2...077b07658.html

But how do you heat an electric car? Not much fun using a totally
unheated behicle in the winter. Even keeping the screens clear becomes a
bit of a problem.

shrug Easy. Instead of a water-to-air matrix, use an electric element.
The actual air distribution and circulation is electric anyway. For
aircon, the compressor is electrically driven, as many power steering
pumps currently are.

Some earlier electric cars had petrol burners to warm the interior. Is
that included in the fuel efficiency claimed?

Just as it isn't in modern common-rail diesels which are so heat
efficient that many of those have an additional diesel-fuelled heater.