This is The Gem.
It was stand for Global Electric Motorcars, part of the Chrysler group. The cost to build this green vehicle is £12,500 and is classified as an electric quadracycle, so does not need to display a front registration plate.

For your information, it was being tried out to see if it could become a key part of community policing, and has been loaned to the Brighton and Hove division to enable neighbourhood officers to travel to street briefings and make local visits.

Actually, this two-seater Gem Cars are already used in the United States by police forces in New York, Los Angeles and Miami before. More than 40,000 Gem Cars have been sold worldwide and they have been used by Nasa. So if you want to own this car,make sure you know where to find it!