Campaigners trying to save the children's heart unit in Leeds say they're appalled the case may go back to the High Court.
NHS England says it wants to appeal against a judge's ruling that a decision to close the unit was based on flawed information.
NHS England and the Care Quality Commission have confirmed that Children’s Heart Surgery Services at Leeds General Infirmary are safe.
Children's heart surgery is set to resume at Leeds General Infirmary after days of uncertainty over its future.
The Children's Heart Federation says the interests of management at the LGI have been "put ahead of critically ill children".