Bosses at the Freeman Hospital Children's Heart Unit in Newcastle have strongly defended the decision to submit a dossier of concerns about a rival unit as it battled for its future.
A report published today suggests some of the claims about treatment of young patients at the Leeds General Infirmary were unsubstantiated and could not be properly described as legitimate whistle-blowing.
The controversy over the heart unit was set against a background of concerns raised by surgeons in Newcastle about the care provided in Leeds.
An independent review found improvements have been made at Leeds General Infirmary, which temporarily closed last year due to fears over mortality rates.
But, the report was critical of the rivalry between heart surgeons at the two paediatric units whose futures were under threat.
The Government played no part in the decision to suspend children's heart surgery at Leeds General Infirmary, peers were told today.
Health minister Earl Howe said the decision was taken by the local health trust in agreement with the Care Quality Commission and NHS medical director Sir Bruce Keogh.
But Liberal Democrat Lord Shutt of Greetland warned there had been "murky internal health politicking" going on over the issue of children's heart surgery in Yorkshire.
Lord Howe said the premise of Lord Shutt's question was "incorrect", adding:
Heart campaigner Sharon Cheng says the NHS appeal is a "waste of money".
The NHS said yesterday there are "good grounds" to appeal a decision made in the High Court regarding the future of children's heart surgery in Leeds.
Last month a judge ruled that the safe and sustainable review panel's decision to close the unit was based on flawed information
Campaigners fighting to save the Leeds children's heart surgery unit say an appeal by the NHS against a previous High Court Ruling is a "disgraceful waste of time and taxpayers' money."
Greg Mulholland, the MP for Leeds North West has attacked the NHS's decision to try and appeal against a High Court ruling regarding the closure of the city's children's heart unit.
The NHS England is appealing against a ruling in the High Court which quashed a decision which could have lead to the closure of the children's heart unit at Leeds General Infirmary.
Last month, a judge ruled that the decision to close the unit was based on flawed information.
Campaigners fighting for the futiure of child heart surgery in Leeds tonight say they don't want the NHS to waste any more time and money and want them to withdraw their appeal.
The NHS in England says there are good grounds to appeal a decision made in the High Court regarding the future of children's heart surgery in Leeds.
Last month a judge ruled that the safe and sustainable review panel's decision to close the unit was based on flawed information.
In announcing their intention to appeal the ruling, NHS England tonight said:
Professor Sir Roger Boyle has stepped down as director of the National Institute of Clinical Outcomes Research. He has been at the centre of the row over the future of the Leeds Children's Heart Surgery Unit.
He said that he would not want his daughter to be treated at Leeds. The comments led to him being taken off the review team that is overseeing changes to children's heart surgery.