Tesla sales plunged by more than half last month in several European countries in a sign that Elon Musk could struggle to revive the company after he shifts from his Washington cost-cutting work to day-to-day operations again.

Tesla's new car sales in Britain and Germany plummeted to their lowest in over two years in April, falling 62% and 46% year-on-year respectively, even as demand for electric vehicles rose in both countries,