Myra Hindley, dubbed "the most evil woman in Britain," killed five children in the 1960s and buried their bodies in the moorland.

Amelia Dyer qualified as a nurse and became a baby-farmer, looking after others' babies, but after many suspicious deaths of children in her care, she was charged with neglect and imprisoned.

Beverly Allitt studies nursing, obtaining a job in the local hospital, where she enjoyed a good reputation until she kills four children, for which she gets put away in Rampton Secure Hospital for life.

Rosemary West and husband Fred West killed ten girls; along with Myra Hindley, Rose is the only British murderess denied any hope of release.

A Victorian Black Widow, Mary Ann Cotton, hanged in Durham in 1873; killing for greed, she murdered her husbands and even her own children.

Hungarian Countess Bathory lures young girls to her castle on the pretext of finding them work then tortures and kills them.