According to the promo, one of the cars on 5th Gear tonight will be the (electric) T.27 city car. It was designed by Gordon Murray, designer of the McLaren F1 and who also worked on the Mercedes-McLaren SLR. It is reported to use 9 kw per mile. Here is a linky to one article Autocar takes Gordon Murray's T.25 and T.27 city cars for a spin, gives us its impressions -- Engadget