Drivers are being warned that they could be at risk of making a common but very costly mistake. 

It comes as experts have shared that since 2011 all new cars in the UK are legally required to have ‘daytime running lights’ (DRL) which come on automatically when the engine is started. 

DRL's are designed to be low-wattage and to help increase visibility and reduce vehicle accidents during the day. 

However, now experts are warning that in many cases the DRL system does NOT automatically illuminate lights at the rear. 

Meaning if you are relying on DRLs on winter roads with poor visibility or during the dark, instead of using your dipped headlights, which do automatically force the rear lights to come on, you could end up with a fine. 

Bradford Telegraph and Argus: CanvaCanva (Image: Canva)

The worst case scenario for those that rely on the DLRs rather than proper headlights is ending up with a £1,000 fine if stopped by the police. 

Graham Conway, Managing Director at Select Car Leasing says: "We had a rash of reports during last week’s rain storms, with drivers taking to spray-engulfed motorways with just their DRLs lit - which is obviously incredibly dangerous. 

“And it would clearly be extremely foolish to rely on DRLs when the sun goes down, too. 

“The most important thing to remember is that many DRL systems don’t automatically light the rear lights. If you want to be seen by the cars who are following you, be sure to click your headlights on.

“According to the Highway Code, you must use headlights when visibility is ‘seriously reduced’ - either through light conditions, rain or fog - and generally when you can’t see for more than 100 metres (328 feet).

“Failure to illuminate properly can lead to a £1,000 fine if spotted by the police."