Three people who were part of the senior leadership team at the hospital where nurse and convicted child serial killer Lucy Letby worked have been arrested on suspicion of gross negligence manslaughter,

Letby, 35, is already serving life in jail and will never be released after being found guilty of attacking the newborns at between June 2015 and June 2016 while working at the Countess of Chester Hospital (CoCH) in northern England.