In 1991 as a trained nurse, Allitt went to work at Grantham and Kesteven Hospital in Lincolnshire where she was posted onto an under-staffed children’s ward.

Over the next four months, Allitt murdered four children on Ward 4 by injecting them with lethal doses of insulin and attacked nine others. Several survived Allitt’s first attack and were transferred to another hospital in central Nottingham, thankfully sparing them further injury.

Allitt was a life long sufferer of Munchausen Syndrome – where the sufferer feigns sickness to draw attention to themselves and Munchausen Syndrome by Proxy – where the sufferer uses the sickness of others to attract attention.

In 1993 she received 13 life sentences and was told that she would serve a minimum of 40 years, though in August 2006 she appealed against this and her sentence is currently being reviewed.