New car sales in the UK dropped 6.2% year-on-year to 183,125 in June, down for the 12th month in a row, according to new figures released by the Society of Motor Manufacturers and Traders (SMMT).
A total of 1,029,638 new cars were registered in the year to June, down 7.1% on the corresponding period 12 months earlier.
However, the Government's car scrappage scheme had helped push figures up this time last year.
The SMMT expects total new car sales to reach nearly 1.93 million by the end of 2011, down from 2.03 million last year.
Paul Everitt, chief executive of the SMMT, said: "Slow, but steady, economic growth in the second half of the year should see volumes increase, although the overall market is still expected to be around 1.93 million units."
There was a 4% year-on-year rise in sales of diesel cars, while the year-to-June figure was up 7.5%.
Average new car CO2 emissions for the first six months of this year fell to an all-time low of 139.7g per kilometre.
The top 10 best-selling models for June were Ford's Fiesta, Ford's Focus, Vauxhall's Corsa, Vauxhall's Insignia, Vauxhall's Astra, Volkswagen's Golf, Mini, BMW's 3 Series, BMW's 1 Series and Nissan's Qashqai.
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