Two scientific experts have resigned from the defence team of Lucy Letby — the British neonatal nurse serving 15 whole-life prison terms for murdering seven babies and attempting to murder seven others at the Countess of Chester hospital in north-west England — citing concerns that some arguments being advanced on her behalf are "inconsistent with the available evidence, science and established physiology." Helen Shannon, a chemical engineering expert, and Geoff Chase, a New Zealand bioengineering professor, had previously produced a report casting doubt on convictions related to insulin poisoning, but said they could not in good conscience support other elements of the defence strategy now being put to the Criminal Cases Review Commission (CCRC), the UK's miscarriage of justice watchdog. Their departure comes as a separate public inquiry led by Lady Justice Kathryn Thirlwall publishes its findings on Tuesday, expected to identify missed opportunities by hospital management to act on doctors' concerns about unexplained infant deaths at the unit in 2015 and 2016.