diesel engine

"You couldn't tell the difference of a car with a petrol or diesel engine, I would like to say the same about an electric car," he said.

Because drayage trucks concentrate fume-pumping diesel engines in a tight location, the air quality in residential areas adjacent to ports suffers.

In the last decade, several car makers admitted to lying about the emissions produced by their diesel engines.

"Little by little taxing petrol and diesel engine cars more, so they have become a lot more expensive to purchase, whereas electric cars have been exempted from taxes."

The company currently makes diesel engines for vans at its Dagenham factory in Essex.