The veteran journalist tells the extraordinary untold story of how the two most notorious women in British crime, Rose West and Myra Hindley, became lesbian lovers in jail. Former Category A prisoners, including reformed Mafia member Marisa Merico and ex-gangster Linda Calvey, tell Sir Trevor how Rose West revealed her murderous temper in prison, while former prison governor Veronica Bird, police officers and prison visitors describe how Hindley cleverly manipulated people in jail, even persuading a female guard to help her escape.