>I saw one of these in Wiltshire a while back
>
>http://www.arielmotor.co.uk/atom/overview/
>
>looked like fun but as an ex biker I always think why not just have the two wheels.

Looks like driving it up to its potential will at least be hazardous to driving license - and how often can you drive only for fun ?
And why put seats in parallell, as weight distribution will be more along the middle when driving alone in a 2-seater with passenger seat in the back ?