One year on from the introduction of the smoking ban and businesses have been warned that drivers who smoke in their vehicles could end up costing the company more than a fine.

"Presentation is one of the strongest price factors in the used market and becomes even more important when used vehicle values are under pressure, as they are now,” Tim Naylor, PR manager at BCA, said.

“Presentation is not just about how it looks, but how it smells.

"As well as the potential fine if caught smoking in a work vehicle – which is classed as a public place – the loss of value should be another good reason for businesses to make sure employees avoid lighting up in company vans.”

While professional valeting can alleviate most of the effects of smoking, it means extra cost and time in the selling process and still might require the replacement of interior trim, such as nicotine-stained headlining.

Naylor added: “With buyers having the upper hand in the current market, it’s vital that businesses selling company vehicles make sure that they are in the best possible condition.

"Any vehicle that has been heavily smoked in will undoubtedly be at a disadvantage.”