The Australian radio station behind a prank call to a British hospital will donate its advertising revenue until the end of the year to a fund for the family of the nurse who was found dead after the stunt.

Southern Cross Austereo, parent company of Sydney radio station 2Day FM, said it would donate all advertising revenue, with a minimum contribution of AU$500,000, to a memorial fund for Jacintha Saldanha.

Ms Saldanha answered the telephone at the hospital treating the Duchess of Cambridge, Kate MIddleton.

The company has suspended the Sydney-based announcers, Mel Greig and Michael Christian, scrapped their "Hot 30" programme and suspended advertising on the station in the wake of the death.

Southern Cross said it would resume advertising on its station from Thursday.

"It is a terrible tragedy and our thoughts continue to be with the family," Southern Cross Chief Executive Officer Rhys Holleran said in a statement.

"We hope that by contributing to a memorial fund we can help to provide the Saldanha family with the support they need at this very difficult time."

Hobbit premiere appearance cancelled

Separately, Ms Middleton’s pregnancy sickness has forced her to cancel an appearance at tomorrow's UK premiere of The Hobbit.

She is suffering from the condition known as hyperemesis gravidarum, which leaves expectant mothers with constant nausea and regular vomiting.

A St James's Palace spokesman said: "The Duchess of Cambridge will not attend The Hobbit premiere tomorrow evening and will continue to rest privately.

"The Duke of Cambridge will attend as planned."