CURRENTLY languishing in prison, Lucy Letby's 15 whole-life sentences for seven murders and seven attempted murders of babie s means she will die behind bars. And many will say good riddance to the nurse, dubbed the 'Angel of Death', who stands convicted of her heinous crimes - despite recent startling suggestions that she could be the victim of a huge miscarriage of justice. The claims made by leading academics, statisticians and even doctors question the evidence on which Letby was convicted and will no doubt bring fresh anguish for the parents of the children whose lives were tragically lost.

While Letby herself continues to profess her innocence as she serves her sentences in HMP Bronzefield , she's among a plethora of female monsters who will see out the rest of their days within the walls of the country's toughest prisons. And the harrowing reasons why they're kept away from mainstream society and will never be released won't be forgotten. Here, Miranda Knox takes a closer look at the UK's most dangerous and notorious female prisoners, who, like Letby, will die behind bars, and why.

.. READ MORE CRIME FEATURES 'Moreish and fun' murder Dubbed Britain’s ''most dangerous female prisoner'', Joanna Dennehy's crimes were recently featured in new Channel 5 documentary, The Killing Spree.

In 2013, she was arrested after a ten-day killing spree, during which she killed three men and left two more fighting for their lives. To walk up to someone in the street like she did and sta.