It would fit in a garage though...
If anybody picked up on this I missed it, but one thing that the Twizzy will do which almost no current production car is able would be to be easily parked in a normal standard single garage with adequate space to easily enter and exit the vehicle.
Unhealthy depreciation also makes them available for a much more reasonable £4500-5000 on the used market too. At that I reckon that it starts to make quite a bit more sense for short range commuting and such like.