My mother-in-law, three sisters-in-law, and one of my sisters met me and TPR in the grounds of a National Trust property for a picnic.

TPR thought that he spotted SC in the queue for the house. He called her name, and then helpfully answered the technical question that she asked on Facebook the previous day.

Unfortunately this was not SC after all, but a complete stranger whose husband was angered by TPR’s approach.

Twenty minutes later, in retaliation, I banged on the window of the house and shouted ‘Hello SC!’ at the woman. I wanted to prove that it was easy to mistake her for our friends, and TPR was innocent of nothing more sinister.