THE hospital caring for Prince William's pregnant wife Catherine has condemned two Australian radio announcers.
The King Edward VII Hospital yesterday admitted a staff member was duped by 2Day FM duo Mel Greig and Michael Christian who posed as the Queen and Prince Charles.
The pair were connected by phone to a nurse treating Catherine and given an update on the Duchess of Cambridge's condition, including that she hadn't experienced any recent "retching".
In the background of the call, in which the pair adopt toffy voices, a third member of 2Day FM staff can be heard pretending to bark in an attempt to impersonate one of the Queen's corgis.
"She's quite stable. She hasn't had any retching and she's been sleeping on and off," the nurse tells the pranksters after referring to Greig as ma'am.
A hospital statement released on Wednesday said the incident has sparked a review of telephone protocol.
"King Edward VII's Hospital Sister Agnes can confirm that an Australian radio station made a hoax call to the hospital in the early hours of Tuesday morning," the statement read.
"This call was transferred through to a ward and a short conversation was held with one of the nursing staff. King Edward VII's Hospital deeply regrets this incident."
John Lofthouse, chief executive at King Edward VII's Hospital, said: "This was a foolish prank call that we all deplore. We take patient confidentiality extremely seriously and we are now reviewing our telephone protocols."
Catherine was admitted to the facility, favoured by the royal family, on Monday as the world learnt she was in the early stages of pregnancy.
She is being treated for acute morning sickness and is expected to be in hospital for several days, the palace said.
Representatives for the Duke and Duchess of Cambridge have not commented on the prank.
"We don't want to cause any trouble," Christian is heard to say during the broadcast.
Greig asks the nurse when she can visit her "granddaughter Kate" and how her "little tummy bug is going".
"When is a good time to come and visit her coz I'm the Queen and I need a lift down there ..."
She is then heard to ask Charles (Christian) when he can take her to the hospital.