Diesel cars continued to be popular in May, with a two per cent increase in registrations, meaning that the sector now has a 39.9 per cent market share, the Society of Motor Manufacturers and Traders (SMMT) has revealed.
For the first five months of 2007, diesel car sales experienced growth of 7.2 per cent, with a total of 27,181 registrations taking place.
The Ford Focus continued to be the best-selling diesel model last month, as it has been for the year to date.
Strong figures for the diesel market emerged despite a slight contraction in the overall market in May, with a total of 185,797 cars being registered â€“ 2.2 per cent down on last year.
"The ever-frugal motorist has helped limit climate change through reduced tailpipe emissions by purchasing more cars with fuel-efficient diesel engines," said Christopher Macgowan, chief executive of the SMMT.
"Hopefully, campaigns such as Act on CO2 will make more motorists aware of both the cost and climate change advantages of modern, cleaner engine technology."
Mr Macgowan referred to recent research carried out by Ipsos Mori, suggesting that the environment is becoming "more of a hot topic" for new buyers.