Wow. The Vitronic Enforcement Trailer is a bullet resistant, portable, and self-propelled system that scans the road for speeding motorists. It can be towed “by any vehicle that has a tow bar”, the manufacturer explained. There is, therefore, no need to have an expensive, dedicated, towing model such as the Land Rover Discovery. Further, Vitronic recognises that the vehicle might only be able to tow the system close to its optimum, scanning, position.

It therefore has two large wheels at the rear – both with drive – plus a small jockey wheel at the front. Drive enables the operator to fine-tune its position via remote control for the best view. The Trailer also spins on the spot, climbs slopes (28%) and hops kerbs.

Once in position, the bodywork sinks lower to conceal the rear wheels which minimises the risk of vandalism. The jockey wheel has to be withdrawn manually, however. The registration plate and light bar is then removed and stored within the bullet resistant, alarmed, interior that can only be accessed via the remote control.