B was in London earlier on this week. He bumped into my sister on the tube. They rang me together at the children's supper time and it made me smile.
"Girls", I said after they'd hung up, "There are seven million people in London and guess who Daddy bumped into?"
They couldn't. I told them. They looked underwhelmed by the coincidence (although that sort of thing happens unstatistically often, don't you think?). But it obviously got L thinking.
"Mummy?" she said. "How many people are there in London did you say?"
"Is that counting Daddy or not?"