Motorists are being warned about a new generation of 'stealth' speed camera vans - which are painted GREY so they can't be seen easily.
The unmarked mobile traps are currently being trialed in Northamptonshire - and if successful rolled out nationally.
They are re-wrapped existing speed vans which are covered in a matte grey coating rather than the typical bright orange and yellow markings seen on UK roads.
It is not a legal requirement for the police nor local authorities to warn motorists about any cameras up ahead.
Police say unmarked speed camera vans encourage consistently safe driving rather than the yo-yo effect when drivers slow down for cameras.
A spokesman for Road Angel hope it will further encourage drivers to be mindful of their speed and the danger it poses to themselves and all other road users.
Gary Digva, founder of Road Angel said: "Introducing these undercover mobile speed camera vans is a positive step forward in reducing the amount of speeding drivers on UK roads.
"Motorists should be aware that other police forces across the country too could be rolling out these covert camera vans and should watch their speed wherever they travel.
"The safest way to drive is to assume that every van you see on the road is carrying a speed camera - then you'll never break the limit, avoid fines and stay safe.
"For motorists that need that extra bit of help keeping within the limit there is technology available that provides drivers with key speed information and safety alerts.
"Although there is certainly still a long way to go to stop speeding vehicles and the number of fatalities and injuries it causes, I hope that deploying these vans will mean motorists will think twice before putting their foot down.
"Not only will you be slapped with a hefty fine and points on your license, you're also seriously putting your own and other road users' lives seriously in danger."
