New data from the vehicle leasing and fleet management firm has revealed that the average carbon emissions of new company cars added to its fleet fell to 120.4g/km in February 2014, a 4.8g/km drop compared with ALD’s previous all-time low of 125.2 g/km at the end 2013.

ALD’s figures show that the rate of reduction in company car CO2 emissions has fallen by 17% in the last five years alone and is now 8g/km below the UK’s average for new vehicles of 128.3g/km in 201.

The data from ALD, which operates a fleet of over 97,000 vehicles, shows that over the last 10 years average CO2 emissions of new company cars have fallen by 27%, in-line with a UK average drop of 25%, according to the latest findings from the Society of Motor Manufacturers and Traders (SMMT), which also shows that a new car in 2014 is typically 14% more efficient than one produced in 2009.

ALD’s analysis of company cars it has delivered to customers to date this year also reveals that 78% have been diesel powered, 21% petrol powered and just 1% powered by alternative fuels.

The fall in emissions comes as the average annual mileage employees are travelling has bounced back 800 miles, from 17,063 miles in the first two months of 2013 to 17,893 in the first two months of 2014.