Evidence of mental illness of a defendant had not emerged at his trial for murder because the nature of the illness made him suspicious, meaning he concealed his symptoms. This could now be admitted as new evidence to the Court of Appeal in order to support the defendant's plea of manslaughter, as opposed to murder, by reason of diminished responsibility.

CA (Civ Div) (Lord Bingham of Cornhill LCJ, Forbes J, Harrison J)

07/12/1998