Mine had the first full charge last night from empty (whatever that is, 20% i think) to full. I looked this morning on chargevision and it is saying the charge was 12.11kw. Now i have checked my elec tariff with First Utility and it is 13.194p/kw so if the figures are to be believed it cost me £1.60 to charge it. I used it this morning and managed about 25miles on electricty to that works out at 6.39p/mile on elec.
My diesel Audi was averaging 46mpg, so at a cost of £1.35 per litre it's cost was £13.35p/mile. Now there is no way i can do everything in Elec mode as i do about 25k per annum but it will be interesting to see what I achieve. I'm already saving £150 per month on BIK!