A retired consultant paediatrician is calling for an investigation into the "grossly negligent" bosses at the Countess of Chester Hospital who failed to act on concerns about nurse Lucy Letby, who was recently convicted of murdering seven babies. Consultants had raised concerns as early as 2015, but hospital management did not involve the police until 2017. The former chair of the hospital trust has claimed that the board was "misled" by executives, while another former chief executive has called for a full public inquiry.