The female prison officer left fighting for her life after being attacked by a prisoner at Blackfriars Crown Court has died.

Lorraine Barwell, a 54-year-old prisoner custody officer for Serco, was assaulted while escorting a prisoner away from Blackfriars Crown Court.

Humphrey Burke, 22, has been charged with grievous bodily harm and is due to appear at the Old Bailey on 15 July 2015 for his preliminary hearing - he could now face charges of either murder or manslaughter.

Justice secretary Michael Gove was "shocked" to hear the news and has commended Ms Barwell for her "courageous and dedicated" service.

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Related: Serco prison officer in critical condition after Blackfriars Crown Court assault