Lucy Letby's lawyers have said they will be asking the Court of Appeal to immediately review all of her convictions because an expert witness "has now changed his mind on the cause of death of three babies".
The former nurse is serving 15 whole-life jail terms for murdering seven babies and trying to kill seven others while working as a neo-natal nurse at the Countess of Chester Hospital.
Her barrister Mark McDonald told a news conference in London that the lead prosecution expert, Dr Dewi Evans, had altered his view.
He said: "Remarkably, Dr Evans has now changed his mind on the cause of death of three of the babies: Baby C, Baby I and Baby P."
Letby was convicted in August 2023 and was refused permission to appeal against her convictions in May.
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