Key dates in the investigation of nurse Lucy Letby

Lucy Letby went on trial at Manchester Crown Court accused of the murders of seven babies and the attempted murders of 10 others at the Countess of Chester Hospital (Elizabeth Cook/PA)

Here are the key dates surrounding the investigation of nurse Lucy Letby.

– June 22 2015: Child D, a full-term baby girl, dies 36 hours after her birth at the Countess of Chester Hospital. It is the third infant death in a fortnight – equalling the total number of deaths on the neonatal unit for the whole of 2014.