The sentence for murder is a mandatory life sentence
Murder is a common law offense; it is not defined by any act of parliament but instead, the definition has been developed through many cases- however, the seventeenth century judge called Lord Coke gave the currently used definition
What is the definition of murder according to the seventeenth-century judge, lord coke?
Murder is the unlawful killing of a reasonable person in being and under the monarch's peace with malice aforethought, express or implied.