Car Sales in U.K. Dropped 5% in May

New-car registrations in the U.K. continued to slide in May, falling 5% to 183,700 units, the Society of Motor Manufacturers and Traders reports.

Sales to individuals, fleet and businesses all shrank last month. Year-to-date sales declined 3% to 1.05 million units. Volume lagged year-earlier levels for the third consecutive month.

SMMT blames the slowdown to continued uncertainty about future diesel policy, the end of incentives for plug-in hybrids and worries about the outcome of the U.K.’s stalled plan to exit the European Union.