Lord Coke's definition - 'The unlawful killing of a reasonable being under the King's peace with malice aforethought, express or implied'.
Most serious of the fatal offences and carries a mandatory life sentence.
AR can be an act or omission (Gibbins and Proctor) which must have caused the death and must be unlawful (not in self defence).
Law Reform's Year and a Day Act - there is no time unit for the death after the killing, although if its after 3 years, the AG's consent is required.
AG reference No.3 - a foetus can't be killed, but if a foetus is injured, born alive, and then later died due to the injury, it can form the AR for murder.
Killing an enemyduring war is not murder as its not under the King's peace.
No clear legal definition of being dead, but its usually defined as brain stem death (Malcherek).
D must have intention to kill (expressed malice aforethought) or intent to cause GBH (implied malice aforethought) (Vickers, Cunningham).
GBH - really serious harm (Smith).
Foresight of the consequences is evidence of intention (Moloney), oblique intent can be shown if death/serious injury was a virtual certainty and D appreciated this (Woolin test).