Section 8(1) of the Criminal Code (WA) does not require that the offence committed in prosecution of a common unlawful purpose be entirely different from the purpose itself; it is sufficient that there is a material difference between the purpose and the offence committed. The section cannot apply to a person who is the principal offender performing all relevant acts — it applies only to secondary parties. An intermediate appellate court is bound to follow seriously considered dicta expressed in majority reasons of the High Court.
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