The number of motorists who put the wrong fuel in their car has doubled over the last 10 years.

It is estimated that at least 150,000 drivers misfuel each year – one every three and a half minutes – generating around 7.5 million litres of contaminated fuel.

Now the AA has launched a national service - AA Fuel Assist - a roadside service that drains, flushes and replenishes vehicle fuel systems on the spot.

The AA is investing around £1.7 million in AA Fuel Assist, which retrieves the contaminated fuel and ensures that it is recycled through a waste management company.