Cameron Diaz. Matt Damon. Leonardo DiCaprio. If there is one “must have” accessory for these Hollywood A-listers, it isn’t the latest smartphone or piece of jewellery. No, it is a car. And a very specific type of car at that.

A Tesla has become almost indispensable amongst America’s celebrity community, reflecting status and wealth at the same time as denoting an interest in the environment that is de rigeur in the sunshine state of California.

The key to Tesla is, after all, not its sleek design or its 17 inch touchscreen dashboard, but the fact that it is battery powered.