Lucy Letby was working a night shift at the Countess of Chester Hospital when Child A, born six weeks premature, suddenly deteriorated and died within 90 minutes of her coming on duty. Child A’s twin sister, Child B, collapsed after air was injected into her bloodstream. She was resuscitated and survived.

The Investigation of Lucy Letby gives a fascinating insight into the police’s treatment of their chief suspect

Made by ITN Productions, the film includes the revelation from one of the Countess of Chester Hospital consultants, Dr John Gibbs, that he feels “tiny guilt” that Letby may have been wrongly convicted...