A woman who murdered a stranger in the street and tried to kill another has lost her bid to appeal against her sentence and conviction.
Nicola Edgington had been given a minimum term of 37 years for the murder of Sally Hodkin and the attempted murder of Kerry Clark in October 2011.
But her lawyers argued that the original trial did not place enough importance on her mental health issues and said her sentence was excessive.
Court of Appeal judges today rejected those arguments and dismissed her application to appeal.
Edgington, who had killed her mother six years earlier, attacked the two women separately as they made their way to work in Bexleyheath, southeast London.
Edgington took a knife from a butcher's shop She bought one knife from Asda and attacked Miss Clark, 22, who was waiting for a bus.
When Miss Clark grabbed the blade and kicked her away, Edgington ran to a butcher's shop and grabbed a larger knife.
She attacked Mrs Hodkin, 58, a law firm accounts clerk, with such force that she almost decapitated her.
Sally Hodkin was murdered on her way to work The Independent Police Complaints Commission (IPCC) found a number of police blunders led to Edgington carrying out the attacks.
The 32-year-old made five 999 calls just hours before, asking to be sectioned under the Mental Health Act because she believed herself to be a danger.
But Metropolitan Police failed to carry out a police national computer check which would have alerted them to her previous conviction for her mother's manslaughter in 2005.
She also sought help at a local hospital from where she called 999, but after delays in admitting her she walked out.
Edgington had been diagnosed with schizophrenia following the killing of her mother but was released back into the community after three years.
The judge in her original trial, which finished in February 2013, called her behaviour "consistent and calculated".
He said: "You are manipulative and exceptionally dangerous. What you did could not have been more selfish.
"I disagree that the responsibility for these acts can be laid on others.
"You made your choice and these were terrible acts for which you must take responsibility."
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