Lucy Letby: killer or coincidence? Why some experts question the evidence

Exclusive: Doubts raised over safety of convictions of nurse found guilty of murdering babies

The verdict handed down to the former neonatal nurse Lucy Letby last week brought to an end more than 21 months of court proceedings. After two trials and two attempts to appeal, Letby has been convicted of murdering seven babies and attempting to murder seven others. She is serving whole-life sentences.

For many there has been little room for doubt that Letby is the worst child serial killer in British history. Jurors heard harrowing testimony from the parents of the babies who died, and were shown notes scrawled by Letby and shift rotas that were used to condemn her.