The King Edward VII hospital in London, where the Duchess of Cambridge is being treated for severe morning sickness, has admitted having fallen victim to a hoax call from a radio station in Australia.
The hospital's chief executive, John Lofthouse, confirmed that Kate's private nurse discussed her condition with the 2Day FM presenters, who were impersonating the Queen, Prince Charles and one of the corgis, but described the hoax as "foolish".
"This was a foolish prank call that we all deplore. We take patient confidentiality extremely seriously and we are now reviewing our telephone protocols. King Edward VII's Hospital deeply regrets this incident," he said.
In the recording, which has been posted online, the nurse can be heard saying: "She is sleeping at the moment and has had an uneventful night. Sleep is good for her at the moment.
"She's been having some fluids to rehydrate her, because she was quite dehydrated when she came in.She hasn't had any retching since I've been here and she's been sleeping on and off."
The Duchess is currently being treated for hyperemesis gravidarum, which can cause severe vomiting and leave expectant mothers feeling tired, dizzy and suffering from headaches.
A spokesman for William and Kate said he would be making no comment.