http://www.legislation.gov.uk/uksi/1989/2288/contents/made

The All-Terrain Motor Vehicles (Safety) Regulations 1989

Vehicles

Speed limits

Activities for disabled people

King's Printer of Acts of Parliament

2011-07-04

CONSUMER PROTECTION

These Regulations prohibit the supply of any regulated vehicle which has three wheels.A regulated vehicle is one which is propelled by an internal combustion engine and is designed or constructed primarily for use in leisure activities on all types of land surface or all types of land surface other than highways or roads to which the public has access except for vehicles for disabled persons and any two-wheeled motor cycle with a side-car.