Re: @ bazza
Sorry - missed this para:
"When I start my car on an average UK morning, the first thing I do is turn the heating full on for a good 15 minutes. In the winter, it's front and rear electric defrost for a good 10 minutes and 50% heating/demist all the time. In the summer, I have the aircon running. I have a feeling that these conditions would invalidate the mileage range claims for any electric vehicle."
Err - it's plugged in, so all you need to do is tell it you'll be driving in 15 minutes, and use the mains feed to preheat the car. Easy. No cold running engine either...