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Two university security officers were injured when protesters forced their way into Butler Library on Wednesday, according to a statement from University President Claire Shipman, who called their actions "outrageous".

Mrs Shipman, who took over the role in March after the previous president resigned, asked students to stay away from the library.

Under the new system, partially introduced in response to the deaths caused by serial killer doctor Harold Shipman, all deaths not investigated by a coroner must be reviewed independently by a medical examiner before a death certificate can be issued.

Luke Shipman never remembered the nights he was screaming in terror after a tour of duty in Afghanistan.

Under the new system, which was brought about partly in response to Harold Shipman's murders, GPs no longer issue death certificates independently.