* Nurse who took phone call at hospital committed suicide
* Hospital treating Prince William's pregnant wife at time
* Hospital condemns radio's prank as "truly appalling"
* Hoax stirs debate on ethical standards in Australia media
By Tim Castle and Morag MacKinnon
LONDON/PERTH, Australia, Dec 8 (Reuters) - The London hospital that treated Prince William's pregnant wife Kate condemned on Saturday an Australian radio station that made a prank call seeking information about the duchess, after the apparent suicide of a nurse who answered the phone.
There has been renewed soul-searching over media ethics after Jacintha Saldanha, 46, the nurse who was duped by the station's call to the King Edward VII hospital, was found dead in staff accommodation nearby on Friday.
The owners of Sydney's 2DayFM said it had done nothing wrong and no one could have foreseen the tragic outcome of the stunt, but two leading Australian firms suspended their advertising.
The hoax, in which the radio hosts - posing as Britain's Queen Elizabeth and Prince Charles despite Australian accents - successfully inquired after Kate's medical condition, has made worldwide headlines.
The hospital's chairman Lord Glenarthur urged the station's owners to ensure that such an incident could never happen again.
"It was extremely foolish of your presenters even to consider trying to lie their way through to one of our patients, let alone actually make the call," he said in a letter to Southern Cross Austereo Chairman Max Moore-Wilton.
"Then to discover that, not only had this happened, but that the call had been pre-recorded and the decision to transmit approved by your station's management, was truly appalling."
The immediate consequence had been the humiliation of two "dedicated and caring" nurses, he said. "The longer term consequence has been reported around the world and is, frankly, tragic beyond words," Glenarthur added.
Australians from Prime Minister Julia Gillard to people in the street expressed their sorrow and cringed at how the hoax had crossed the line of acceptability.
Two large companies suspended their advertising from the popular Sydney-based station and a media watchdog said it would speak with 2DayFM's owners.
The hoax raised concerns about the ethical standards of Australian media, as Britain's own media scramble to agree a new system of self-regulation and avoid state intervention following a damning inquiry into reporting practices.
Southern Cross Austereo Chief Executive Rhys Holleran told a news conference in Melbourne on Saturday that the company would work with authorities in any investigation. He said he was "very confident" that the radio station had done nothing illegal.
"This is a tragic event that could not have been reasonably foreseen and we are deeply saddened by it. Our primary concern at this stage is for the family of Nurse Saldanha."
Holleran added that 2DayFM radio hosts Mel Greig and Michael Christian were "completely shattered" by Saldanha's death. The pair will stay off the air indefinitely, he said.
London detectives have sent a request to Sydney police to question the two presenters, Britain's Sunday Times said.
"Officers have been in contact with Australian authorities," a spokesman for London's Metropolitan Police said.
Two high-profile Australian firms, the Coles supermarket group and phone company Telstra, said they were suspending advertising with the station.
Austereo said all advertising on 2DayFM had been shelved until at least Monday in a mark of respect to advertisers whose Facebook pages were inundated with thousands of hate messages.
The Twitter accounts of Greig and Christian were removed shortly after news of the tragedy in London broke.
Social media were inundated with angry messages to the radio station in what has become the latest shock radio story to rile the Australian public. Earlier this year 2DayFM was reprimanded by Australia's independent communications regulator after a radio host talked a 14-year-old girl into revealing on air that she had been raped.
So-called "shock jock" radio announcers are frequently denounced in Australia for their deeply personal and often derogatory attacks on politicians and ordinary citizens.
Communications Minister Stephen Conroy said that the independent broadcast regulator, the Australian Communications and Media Authority, had received complaints about the hoax.
The media fallout from the tragedy could extend beyond Australia's shores, said British radio presenter Steve Penk, who has made a career out of prank calls.
"I think it will probably be the death of the wind-up phone call. I think (British media regulator) Ofcom will wrap it in so much red tape that it will make it almost impossible to get these things on the air," he told Sky News.
Saldanha lived with her husband and two children in the western English city of Bristol. She moved to Britain from India around 10 years ago, British media reports said.
Her husband's family, who live in the southern Indian state of Karnataka, told news agency Asian News International they would miss their "good-natured and beautiful" relative.
"At eight o'clock in the morning, he (Saldanha's husband) rang up to say that she is no more, more than that we do not know about what actually happened. She is dead, that's all," said Camril Barboza, Saldanha's mother-in-law.
The British royal family has long had an uneasy relationship with the media, which sank to its lowest after the 1997 death of Prince William's mother Diana in a Paris car crash.
Palace officials acted swiftly this summer when a French magazine printed topless photos of Kate on holiday, taking legal action to curb republication.
Saldanha's death threatens to cast a pall over the enthusiastic public welcome given to Kate's pregnancy, which dominated newspaper front pages this week.