New car sales dipped again last month.
There were 183,125 new registrations in June - 6.2% down on the June 2010 total, the Society of Motor Manufacturers and Traders (SMMT) said.
This was the 12th successive month that sales, which were boosted last year by the Government's car scrappage scheme, have fallen.
Registrations for the first six months of 2011, at 1,029,638, were down 7.1% on the scrappage-boosted January-June 2010 period.
The SMMT believes the 2011 year-end total will be around 1.93 million, compared with 2.03 million in 2010.
SMMT chief executive Paul Everitt said: "June new car registrations continued to perform in line with industry expectations, with robust demand in the fleet sector and a relatively weak retail market.
"The balance of demand makes this a tough time for vehicle manufacturers and their dealer networks.
"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."
Diesel car sales rose by 4% last month and are up by 7.5% in the first half of this year.
Average new car CO2 emissions for the first half of 2011 dipped to an all-time low of 139.7g per kilometre.
These were the best-selling models in June 2011:
1. Ford Fiesta
2. Ford Focus
3. Vauxhall Corsa
4. Vauxhall Insignia
5. Vauxhall Astra
6. Volkswagen Golf
8. BMW 3 Series
9. BMW 1 Series
10. Nissan Qashqai