Cars are displayed outside a Volvo showroom in west London October 4, 2013. New car sales in Britain soared 12.1 percent on the year in September to the highest number in more than five years, the Society of Motor Manufacturers and Traders said on Friday. September is a key month for the auto industry as it marks a twice-yearly change in registration plates.REUTERS/Luke MacGregor (BRITAIN - Tags: TRANSPORT BUSINESS)