Former neonatal nurse Letby lost two bids to challenge her convictions at the Court of Appeal last year.

Veteran MP Sir David Davis, who has been assisting Letby’s legal team, described her convictions as “one of the major injustices of modern times”.

The panel, including experts from Canada, the U.S, Japan, Germany, Sweden and the UK, looked at 17 cases at the heart of Letby’s prosecution.

In a lengthy and medically technical press conference, chair of the panel Dr Shoo Lee, a Canadian neonatal care expert, said there were alternative explanations for each of Letby’s convictions for murder or attempted murder.

Dr Lee said he became involved in the case after learning that an academic paper he co-authored on air embolism, one of the methods Letby was said to have used to attack babies, formed part of the prosecution case in her trial.

He said the 14 experts, had compiled an “impartial evidence-based report”.

The report presented at the conference was a summary of the panel’s findings, and the full report would be submitted to Letby’s legal team Dr Lee said.