CAROLYN is a big fan of Agatha Christie, so years ago I bought us tickets to The Mousetrap in London. I enjoy watching Christie adaptations on TV and on stage, so I was looking forward to it. And then a friend who was round for dinner one evening decided it would be humorous to ruin the ending of The Moustrap for me by telling me whodunnit (you know who you are, Moffat!).

I still enjoyed it, but of course would have preferred not to know the identity of the culprit in advance.

Tonight Carolyn told me that the Irish comedian, Ed Byrne, is advertising his gigs on Capital Radio at the moment by telling listeners to go see his gig instead of The Mousetrap and revealing the identity of the murderer just to make the competition less attractive. All very post-ironic and anarchic, I’m sure, but I’d be furious if I hadn’t already seen it and was planning to.

Anyway, if you’ve heard the advert then you’ll already know that it was ███ ███████. So now you know.