If I turn the light switch to "auto" on my Ford Focus the lights come on by themselves at dusk. Annoyingly, they also come on uselessly in low sun, and they won't come on at all in thick fog. So much for the wonders of technology!

I can't be alone in recalling that, when we were young, we considered that anyone driving a Volvo estate was automatically a tosser. The running lights were merely there to help us identify such people in plenty of time. Now what was that that crusty old joke....

What's the difference between a hedgehog and a Volvo estate?

With a hedgehog the pricks are on the outside...