Lucy Letby colleagues began ‘thinking the unthinkable’

Another paediatric registrar at the hospital, Dr Huw Mayberry, also told the inquiry how he was “devastated, shocked and bewildered” by the deaths of two triplets, Babies O and P, who it later transpired had been killed by Letby in June 2016.

Dr Mayberry said nothing seemed unusual on the night shift before Baby O died and the only concern about Baby P was that his sibling had died the day before.

He said in two and a half years as a paediatrician he had “seen nothing like it”.

Dr Mayberry told the inquiry he was not aware of any suspicions about any member of staff at the time.

Letby was convicted of murdering seven babies and attempting to murder seven others between June 2015 and June 2016, including two attempts to kill the same baby.

The 34-year-old, originally from Hereford, is serving 15 whole-life prison terms.

The inquiry continues.