Company cars are emitting more than 40pc less carbon dioxide than they were four years ago.

Data from ALD Automotive reveals a reduction in both company car CO2 emissions and annual mileage since February 2006.

ALD Automotive marketing director David Yates said: "We have tracked a remarkable transformation in our fleet in terms of both the type of company cars increasingly chosen by businesses and their drivers, and the amount of mileage clocked up."