A key medical witness in the Lucy Letby trial has said he has changed his mind about how one of the babies was killed.

Lucy Letby was not present when a baby she was convicted of killing was harmed, a BBC investigation has reported. Letby was found guilty of killing a boy known as Baby C by injecting air into his system at the Countess of Chester Hospital in June 2016.

Doctors were growing increasingly concerned about the link between Letby and dying babies at the hospital, but thought the problem would be dealt with by NHS bosses

A doctor has told the public inquiry into Lucy Letby’s crimes that he felt "ashamed" for "failing to protect" babies from the former nurse. Consultant paediatrician Dr John Gibbs, now retired, was working at the Countess of Chester Hospital when Letby began attacking vulnerable babies on the neonatal unit in June 2015.

A key medical witness in the Lucy Letby trial has said he has changed his mind about how one of the babies was killed.

Dr John Gibbs told the public inquiry into the serial killer's (pictured) crimes that he and his colleagues were guilty of 'dithering' and should have called in police sooner.