As I write, some people are very proud of themselves for letting down the tyres of SUVs parked in urban areas.

I’m no great fan of 4x4s bought for no good reason, but my own Land Rover Land Rover Defender sometimes ends up in town after a day hauling animal feed in the sticks, because there are no trains to get home after work.

Letting down tyres of random SUVs is stupid for this and a number of other reasons, including the inevitability that, at some point, someone kneeling next to a Range Rover Sport with a ‘BO55’ or ‘B16’ numberplate will be discovered by a particularly unsympathetic owner.

But I’m more intrigued as to what defines an SUV. Where does estate become crossover; does crossover become XC; does XC become SUV; does SUV become 4x4? And if these guys know, would they like a job in editing our data section?

98 Matt prior citroen c5x phev tracking

THEY KNOW, YOU KNOW. The data. It’s all there. If you buy a new plug-in hybrid Citroën C5 X, it will ping head office every now and again to grass you up about how often you’ve plugged in the car – or haven’t.

It’s all anonymised, they say, and GDPR-compliant. But Citroën CEO Vincent Cobée explains: “We know, based on 200 million kilometres of results, the fuel economy and what we need to influence the number of people charging.”

Your Citroën PHEV will send you reminders if don’t plug it in regularly. “The less often you charge it, the more often you get a reminder,” says Cobée.