The joke impersonation of the Queen and Prince Charles had hurt the network by $2.2 million in advertising revenue and cost $1.4 million in expenses, the station claimed.

The worst hit by the scandal though has been the Hot30 presenters who made the call, Michael Christian and Mel Greig, who were taken off air after the call to London’s King Edward VII Hospital in December went awry.

The nurse at the other end of the phone, Jacintha Saldanha was later found dead in a suspected suicide.

Southern Cross Austereo chief executive Rhys Holleran said his company had “put our processes under the microscope” after the “unforeseen tragedy”.

“We are reasonably happy with what we have seen and we have seen some areas where we think we can do better than we previously did,” he said.

The main advertising drop came when the station suspended advertising after a public and media outcry in Australia and the UK, and following the withdrawal of advertising from Coles and Telstra.

Christian has since returned to air and Greig is tipped to be back at work soon.