Sales of new cars in the UK fell by 5.7% in 2017 compared with the previous year, with sales of diesel cars worst hit.
More than 2.5 million new cars were sold last year, with diesel cars accounting for 42% of the total market, compared with petrol cars at 53%.
The continuing uncertainty surrounding new diesel cars – including the new tax implications announced in November's autumn budget – meant that diesel sales were down by more than 30% in December alone compared with the same month in 2016.
Despite these numbers, though, the Society of Motor Manufacturers and Traders (SMMT) says that the demand for new cars in 2017 was still the third highest this decade, behind 2016 and 2015's numbers. This is, however, the first time that the total amount of new car sales in a year have fallen since 2011.
The largest growth in 2017 came from alternatively fuelled vehicles – which includes hybrids and fully electric cars, which jumped by 34.8% across the year. It's worth noting, though, that despite that impressive figure such vehicles only account for 4.7% of the total market.
The majority of new cars sold last year were city cars, small cars and SUVs, with the latter being the only market to grow in 2017. In fact, one in every five new cars sold in the UK last year was an SUV.
SMMT chief executive, Mike Hawes, said: "The decline in the new car market is concerning but it's important to remember demand remains at historically high levels.
"Confusing anti-diesel messages have caused many to hesitate before buying a new low emission diesel car. Keeping older vehicles on the road will not only mean higher running costs, but will hold back progress towards our environmental goals."
The SMMT says that it expects the UK's new car market to remain "weak" in 2018, but that "the upside for consumers is some very, very competitive deals".
Click through this slideshow to see the top ten best-selling new cars in the UK for 2017.