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.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version.
You can receive Breaking News on a smartphone or tablet via the BBC News App. You can also follow @BBCBreaking on X, external to get the latest alerts.
Fieldway Group hits new heights as it celebrates 25th anniversary with record revenues
A-List stars appeal to Liverpool residents to help them get trophy hunting banned – he's how you can help today
Mum of three killed by her partner on first night of family holiday
Owen Drew launches seasonal candle for Clatterbridge cancer charity
New Brighton in Bloom scoop double award at RHS Britain in Bloom 2024
DWP to introduce new measures for people claiming up to £737 each month in PIP
Alleged Chinese spy with links to Prince Andrew named as Yang Tengbo
'I didn't intend to leave Syria,' purported statement by Assad says
Calls for Archbishop of York to resign over Church failings in sex abuse case
'The school system is broken': Why more parents are home-educating their children
Why a nation of 1.45 billion wants more children
Murder and mayhem: The story of Glasgow's deadly gang feud
Story behind the punk hit that took on Wham! and Band Aid for Christmas number one
'We just need peace': BBC speaks to Syrians watching Israel's incursion
The Upbeat newsletter: Uplifting stories delivered to your inbox every Monday
New name, no photos: Gisèle Pelicot removes all trace of her husband
'I am not good enough' – Guardiola faces daunting and major rebuild
Tracing the powerful family roots of suspected killer Luigi Mangione
Alexei Navalny the fearless Russian political figure
Alexei Navalny died in 2024 in a Siberian penal colony. Benedict Cumberbatch reads his life in words
Your first look at the final episode of Gavin & Stacey!
Watch from Christmas Day on BBC iPlayer
Elis and John's joyful christmas special
Featuring festive treats and some very special guests
Provocative, haunting new drama
Rebecca Hall leads an artful adaptation of Jordan Tannahill’s enigmatic novel
© 2024 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
Français 
English