New evidence suggests more babies in the care of killer nurse Lucy Letby were harmed - and in one case poisoned with insulin.

Letby was was found guilty of murdering seven babies and attempting to murder seven more, including trying to kill two with insulin at the Countess of Chester Hospital neonatal unit between June 2015 and June 2016.

UK correspondent Gavin Grey says one of these babies was found to have suspiciously high levels of insulin after Letby had taken over the infant's care.

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