A person who has passed the the full motorcycle test before 01 March 2001 has automatic entitlement to drive a quadricycle, however, any person taking a full motorcycle test after this date is not entitled to drive an Aixam on a motorcycle licence.
4-wheel Microcar Virgo.
My brother-in-law has had one for 4 years. I think he bought it from a deaer in Selby, Yorkshire......Michael's of Selby I think the name is. http://www.michaelsofselby.co.uk/
It's classed as a road legal quad because of its weight and so can be driven on a motorcycle licence.