Now, Letby's lawyer, Mark McDonald, is submitting new medical evidence to the Criminal Cases Review Commission (CCRC), claiming it undermines the prosecution's case and offers 'new hope' for an appeal.

Cheshire Constabulary is conducting a review of deaths and non-fatal collapses of babies at the neonatal units where Letby worked, emphasizing the thoroughness of the original investigation and trial process.

A public inquiry led by Lady Justice Thirlwall is set to publish its findings in November regarding the systemic failures that allowed Letby to commit her crimes.

Following the inquiry, Cheshire Police announced a widening investigation into potential corporate manslaughter charges against hospital staff, which some view as a diversionary tactic.

Lucy Letby, a former neonatal nurse, is currently serving 15 whole-life orders after being convicted in August 2023 of murdering seven newborns and attempting to murder six others between June 2015 and June 2016.

Her trial was one of the longest murder trials in British history, featuring extensive expert testimony and evidence.

Letby has previously lost two appeals against her convictions in May and October 2024.

The CCRC's ongoing review of the case follows Letby's unsuccessful appeals in the previous year regarding her convictions.

An international panel of 14 neonatologists and pediatric specialists concluded that poor medical care and natural causes led to the infants' collapses, asserting that they found no evidence of murder.

A separate report from seven medical experts challenges the reliability of insulin test results used in Letby’s trial, stating that the testing procedure was flawed and key information was omitted.

Families of Letby's victims have criticized the new evidence as a publicity campaign rather than a legitimate challenge to the original trial findings.

The CCRC will evaluate the application and decide on referring the case back to the Court of Appeal, where Letby has previously lost two appeals.