Tesla's new car registrations in Britain and Germany, Europe's biggest auto markets, more than halved in July from a year earlier, as CEO Elon Musk's political views deter buyers and the company grapples with regulatory challenges.

A group of investors are pushing back against Musk, claiming the company played fast and loose with autonomous vehicle technology.

After all, it turns out apparent Nazi salutes and supporting Donald Trump, then falling out, aren't appealing to the British consumer.