The Queen is on a royal state visit to Iran and is staying in Tehran's equivalent of Buckingham Palace.
"I say, President Ahmadinejad," HM whispers, "where's - you know! - the Shah?"
"Very sorry, Your Majesty," Ahmadinejad replies, "but we got rid of the Shah in 1979 during the Glorious Revolution!"
"Hmm," Queen Elizabeth harrumphed, "how very enlightened; I supposed I'll just have to have a bath."
