Top Gear's Very Important Consumer Test: what's the best way to sleep in your car?

From an £800 bespoke inflatable mattress made for a Chinese crossover, through a £2k camping kit for a Dacia, via roof tents for a Porsche 911 and Land Rover Defender, up to camper vans nudging six figures, these are how OEMs officially encourage sleeping in or on your car.

Time to find out which is best...