You know that "Oh bugger" moment when you see the flash of a speed camera?
Well, I was beetling along Putney High street at a rate of knots, near dusk, when there was a sudden flash of light in my face, and I could see that it had come from a speed camera just in front of me. "Oh bugger," I thought, automatically.
Then I thought - no, it's someone else. Can't be me. No way.
Because I'm on my bike. And if I do even 20 mph, that's on a steep downhill with a tail wind.