I was in Cafe Nero at Kings Cross station on Tuesday when I was approached by two young women conducting a survey.
"Can you spare a few minutes?" they said. "We're asking people about God."
"I'm probably not the right person to ask," I said. "I don't believe in God."
"Do you pray?" said one brightly.
"Yes," I said, "but only if my football team is one-nil down with three minutes to play."
"There you are," she said, a note of triumph entering her voice. "You do believe in God!"
And with that she ticked a box and moved on to the next customer.