Working in collaboration with the Roads and Armed Policing Unit, Norfolk Trading Standards inspected 10 randomly selected cars and found half of them to be unfit for the road.
A spokesman for Norfolk County Council Trading Standards said: ‘Trading Standards officers and police examiners checked the safety and roadworthiness of 10 vehicles during the day, with half found to be in an unroadworthy condition.
‘Issues included a lack of a valid MOT, corrosion of body work and window tinting exceeding legal levels.
‘Our enquiries with the businesses are ongoing.’