The other day a fellow journalist sent me a very short video clip posted by a conspiracy theorist, sorry “independent investigator”, on his website. It showed a school playground and a window of the school before trailing off. The photographer was apparently investigating what he called the “Hampstead Cover Up case”. Soon, he suggested, he would have much more to say and show.

Though she knew of my interest in false allegations of satanic child abuse, what my colleague didn’t know is that I can see the place from which the video was taken from my doorstep. It’s a passage between a Church of England primary school and the church next door.

Three years ago the school and the church were subjected to a campaign