Question to the Department for Transport:

To ask Her Majesty’s Government whether, in relation to robotic machinery used on a highway, there is a legal distinction between ground-based robots and driverless cars, and if so, what is that distinction.

The UK's road traffic legislation regulates the use of mechanically propelled vehicles, including connected and autonomous vehicles, on our roads. This would cover machinery, robotic or otherwise, used on a highway, if it is intended to be used as a vehicle on a road.