A few days ago, as I walked through the Underground a large Muslim, four inches taller than me, barreled up to me and out of nowhere threatened to beat me up if I didn’t get out of his way.

This was something of a surprise. I don’t think looking at me it shows, but I have always feared I am man who contains the inner potential for serious violence if challenged or attacked.

It’s one of the reasons I have always loved rugby. It lets it out in a safe way.  So I have always been more than ready to defend myself vigorously in the case that a mugger should pick on the wrong person. But I am older now, and he was not only bigger but thirty years younger.