Hey Miss City Woman shooting me a dirty look because I’m blocking the escalator. I used to be you. I too got irritated by slow walkers, and babies that shrieked in coffee shops while I was trying to have a quiet conversation over a frapuccino.

I too rushed around, darting around people in a mad rush to shave two minutes off my commuting time.

Now I am slow. I have to loiter at the bottom of stairs on the Tube waiting for unhurried strangers to help me hoist my pushchair up. If I am in a particularly bad mood I will ‘accidentally’ nudge your Achilles heel with the back of my wheel. It will hurt.

One day in the not-too-distant future you will probably be me, and remember how unsympathetic you were.