Prosecution expert witness Dr Dewi Evans denies changing his opinion about how three babies died.

The nurse was convicted of the murders of seven babies and the attempted murder of seven more.

The killer nurse was not referred to the nursing regulator because of a "lack of evidence", inquiry hears.

The inquiry into Lucy Letby's crimes has heard whistleblowers feared speaking out about their concerns.

Coroner Nicholas Rheinberg tells a public inquiry he was not made aware of concerns about Lucy Letby.

Raising concerns in the NHS is like "throwing a pebble in a dark hole", an inquiry hears.

The coroner said he was not told by hospital bosses that they had concerns about a member of staff.

The serial killer nurse has been interviewed over more deaths and collapses at two hospitals.