A planned clampdown on car clocking has been announced by the government following the alarming revelation that up to 100 firms offer a service to digitally cars’ odometers.

An investigation carried out by The Sun discovered the figure and as a result, the government is to crackdown on a loophole currently exploited by these businesses.

While illegal to sell a clocked car without revealing its true mileage, actually altering a cars’ odometer is not illegal. In an effort to avoid this loophole, earlier this year the European Parliament announced plans to ban mileage-altering companies from May 2018.

A spokesperson for the European Parliament said: "The government will look into this matter. Clocking with the intent to sell is a criminal offence and any suspected breaches should be passed on to Trading Standards to investigate."

Vehicle history checking service HPI believes that there are as many as 1.7 million cars on Britain’s roads with clocked odometers. The firm backs to government’s pledge to clamp down on mileage clocking, and reiterated how lower mileage vehicles will generally sell for more than a car with a higher mileage.

Not only an illegal practice, clocking can also be dangerous, as other things controlled by the ECU, such as safety warnings, can put out of sync by altering the digital reading.