That's all for our live coverage of the news conference.
Retired neonatologist Dr Shoo Lee and senior Tory MP David Davis revealed the findings of a 14-member expert panel analysing medical evidence considered in the trial of Lucy Letby.
Letby killed seven babies and attempted to kill seven more while a nurse on the neonatal unit at the Countess of Chester Hospital. She is serving 15 whole-life orders.
Each murder was independently examined by two experts, who were asked to determine the cause of death.
Lee claimed the review "did not find any murders", calling into question the evidence of Dr Dewi Evans, who was the prosecution's lead medical witness. Dr Evans has said criticism of his evidence is "unsubstantiated, unfounded and inaccurate".
Lee began the news conference with a message to the parents of Letby's victims, saying the panel was not there to cause "distress" but to "tell the truth":
'Error or natural causes'
"There was no medical evidence to support malfeasance causing death or injury in any of the 17 cases in the trial," Lee claimed.
"Death or injury of all the affected infants were due either to natural causes or to errors in medical care."
He accused the Countess of Chester Hospital of a litany of failures, including unsafe delays in diagnosis and treatment, poor skills in resuscitation and incubation, and the misdiagnosis of diseases.
Lee presented alternative causes of death for several babies.
He said infection killed Baby Seven, traumatic delivery led to the death of Baby 15, and chronic lung disease complicated by antibiotic-resistant bacteria ended the life of Baby Nine.
The findings of the panel attempted to undermine the methods by which the prosecution argued Lucy Letby attacked the infants, in particular that she injected air into their bloodstream, causing an air embolism that blocked the blood supply.
"The notion that these cases are air embolisms because [the babies] collapse and because there were skin rashes has no basis in evidence. Let's be clear about that," Lee said.
Letby's lawyers have applied for a review of the case as a "potential miscarriage of justice" by the Criminal Cases Review Commission after two failed bids at the Court of Appeal - read more on that in our previous post.