Whenever I ferry my children around we play the car game. It’s a fairly simple activity where you try to spot as many cars of one particular colour as possible. My two often choose black, white or grey, which are likely to be the winners, while I am told that my colour is “rainbow” or brown or some other obscure shade that you are unlikely to see on any motor.
But as we drive through the Nappy Valley of Wandsworth, in southwest London, there’s something else I spot: Volvo XC90s, Porsche Cayennes, Range Rover Vogues, Teslas. Fancy cars with hefty price tags. This is common around the capital and it always amazes me how everyone seems able to afford these bank-busting vehicles. The answer is