Lucy Letby’s lawyers set to announce new evidence which they believe ‘significantly undermines’ her convictions for murdering babies

Lucy Letby’s appeal team will soon announce ‘new evidence’ which they say ‘significantly undermines’ her baby murder convictions.

Lawyer Mark McDonald, who is representing the murdering neonatal nurse – who is serving 15 life sentences – said he would provide details of “new developments” in the case.

Mr McDonald said he will make his announcement tomorrow afternoon at the Royal Society of Medicine in London.

Letby, 34, was convicted of the murder of seven babies and six attempted murders of babies in her care at the Countess of Chester Hospital between June 2015 and June 2016, following a trial last year. She was found guilty of a seventh attempted murder after a retrial in the summer.

Mr McDonald said: ‘There will be a press conference from the legal defense team for Lucy Letby to announce new developments in the case. At the conference we will also reveal new evidence that significantly undermines the convictions.’

The attorney declined to release further details ahead of the new evidence or what aspects of the prosecution he believes are unsafe.

Mr McDonald revealed he has met with more than 50 experts in neonatology, pathology and statistics who are willing to help challenge Letby’s convictions.

Evidence cited by her supporters includes flaws in the door movement data used to pinpoint the locations of various doctors and nurses when baby collapses and deaths occurred.

Lawyer Mark McDonald, who is representing the murdering neonatal nurse – who is serving 15 life sentences – said he would provide details of “new developments” in the case.

Mr McDonald said he will make his announcement tomorrow afternoon at the Royal Society of Medicine (pictured) in London

The jury was also not told how internal and external investigations – conducted by the hospital, government agencies, medical experts and pathologists – found no evidence of foul play, its supporters argue.

Other reasons include that jurors were not told that the neonatal unit had suffered an outbreak of a virus called pseudomonas, and was criticized for being busy and understaffed.

Mr McDonald is a human rights lawyer whose previous cases include a failed trial by Michael Stone, who was given three life sentences for the murder of Lin Russell, 45, and her six-year-old daughter Megan, who were found beaten to death in Chillenden. Kent, in July 1996.

He also represents Ben Geen, convicted of murdering two of his patients and poisoning fifteen others at Horton General Hospital in Banbury, Oxfordshire.

Geen, then 25, was given a life sentence in 2006 with a minimum term of 30 years.

While previously discussing the Letby case, Mr McDonald said in September that he plans to refer her case to the Criminal Cases Review Commission (CCRC), with a request for it to be sent back to the Court of Appeal.

He said: ‘I knew almost from the start, after this trial, that there was strong evidence that she was innocent.

Court artist’s drawing of Letby during her trial at Manchester Crown Court. Detectives interviewed Letby in prison under caution due to more deaths and incidents of babies suffering ‘serious harm’ at the Countess and also at Liverpool Women’s Hospital

“The fact is, juries get it wrong. And yes, that also applies to the Court, history teaches us that.’

The press conference is being held as the ongoing public inquiry into how Letby committed her crimes – led by Lady Justice Thirlwall – takes a break to resume in the new year.

Last week it was revealed that detectives interviewed Letby in prison under an abundance of caution due to more deaths and incidents involving babies suffering ‘serious harm’ at the Countess and also at Liverpool Women’s Hospital, where she spent time in 2012 and early 2015 during her placement.

Police previously said they would review the care of the more than 4,000 babies Letby cared for during her career.