The is one I've seen. A 3 wheel trike kind og thing. I can't remember the name.
Yes, though electric is a very good idea, the main problem has been range. Good for city and not very long trips.
You look at the Tesla.
http://www.teslamotors.com/
At near £100K. Built by Lotus in Norfolk. But a range of 220 miles. This is a lot by electric car standards.
But still not far enough for me. For example. Stoneleigh is 121 miles away. I'd be looking for someone with a generator to recharge when I got there.
Great idea. But until technology gets better (and range), I think it will struggle in a main stream and will only be sold in small numbers.