The key expert in the Lucy Letby trial reported 25 further suspicious incidents to police

An expert witness in the trial of serial killer nurse Lucy Letby has reported 25 further suspicious incidents to police, it has been revealed.

Dr. Dewi Evans described finding additional concerning cases after reviewing all 82 medical records provided to him following her murder conviction.

The pediatrician, 75, told the Telegraph he has now stopped working on the Operation Hummingbird investigation in Letby and does not know why no follow-up action has been taken as he no longer has a license to practice – having retired in 2009.

Letby, 34, was convicted at Manchester Crown Court in August last year of seven counts of murder and seven counts of attempted murder of 13 victims – after twice trying to kill one of the babies.

For each guilty verdict, she was sentenced to 14 life sentences, meaning she will die in prison and has no chance of parole.

Judge Goss said she was responsible for a “cruel, calculated and cynical campaign of child murder” between June 2015 and June 2016.

At a retrial in July, a jury convicted Letby of the attempted murder of another child, known as Baby K.

A public inquiry is currently underway into how she came to kill the babies while on duty at the Countess of Chester Hospital in Cheshire.

It will also examine how the NHS handled the case and how it responded to doctors who raised concerns.

Medics at the Countess say they have repeatedly reported concerns to hospital leaders about a rise in deaths in the neonatal unit, but their concerns have been dismissed and not addressed.

The inquest was told that executives would dispute the exact point at which they were specifically told that Letby was being linked to foul play.

Dr. Evans was the clinician who originally evaluated the medical records of babies from the hospital after concerns were raised by consultants about deaths under Letby’s care.

Now he told the Telegraph: “Following the verdict I wrote to Cheshire Police last September and said: ‘Look, I’ve only made preliminary reports on this but I think they need to be investigated in more detail.’

“And I just listed 25 of my cases, and it may be that nothing comes of any of them – for example, I found a baby who had a displaced breathing tube.”

“Well, without a displaced breathing tube you can’t prove anything, but if that breathing tube was displaced and there was no obvious reason for it, then you might be a little worried.”

“And then there are other babies who suddenly became seriously ill with an infection.” Okay, premature babies are always at risk of infection. So there were other worrying cases.’

He also said 10 deaths were not brought before the criminal trial jury because they lacked “significant consistencies” that suggested a crime.

Some doubts have been raised about Letby’s guilt in recent months – with some members of the Royal Statistical Society raising concerns about the use of statistics to secure a conviction on the basis of probabilities.

But Dr. Evans said today: “There were problems with all seven of these (babies) which were suspicious. “Why did this baby collapse? That’s suspicious. Babies don’t do this all of a sudden.

“Why didn’t these babies respond to resuscitation?” That in itself is suspicious.

“Most surprising were the comments from neonatologists who should know better, commenting on cases where they had not seen the clinical records and had not been to court.”

The criminal trial was told Letby made a complaint against the hospital in July 2016 after she was dismissed from frontline nursing.

It was confirmed and managers asked counselors to write a letter of apology to Letby, telling her that arrangements were being made for her return to the unit.

It was only because the counselors continued to object and insist that the police be called that it never happened.

After Letby’s sentencing in August last year, the medical director of the Countess of Chester Hospital, Dr. Nigel Scawn: “I speak on behalf of the entire trust when I say how deeply saddened and appalled we are by Lucy Letby’s crimes.”

“We are very sorry that these crimes were committed in our hospital and our thoughts remain with all the families and loved ones of the babies who were harmed or died. “We cannot even begin to understand what they have been through.

“This case has had a profound impact on our patients and our local community, as well as our staff, who come to work every day with a strong commitment to providing safe, high-quality care to all of our patients.”

“Our staff are devastated by what happened and we are committed to ensuring lessons continue to be learned.”

“We are grateful for the cooperation of our staff, particularly those who maintained the highest level of professionalism in their testimony during this process.”