Sorry sorry
just one more
http://www.ramboll.co.uk/projects/re..._power_station
http://www2.nationalgrid.com/uploade...15_16%20v4.pdf
electric car
0.49 (power plant) x 0.91 (national grid UK efficiency) x 0.68 (electric car) = 0.30
petrol and diesel cars in UK
0.88 (refinery, I disagree with this figure) x 0.99 (trucks to pump) x 0.25 (combined petrol and diesel vehicles in UK) = 0.22