A trial judge's obligation to intervene to exclude inadmissible evidence where no objection is taken arises only when admission would give rise to a substantial miscarriage of justice — either the loss of a fair chance of acquittal (Mraz) or such a departure from essential requirements of the law that proceedings are fundamentally flawed. An appellant who failed to object at trial bears a heavy burden on appeal. Evidence of recent complaint is admissible in relation to offences of administering stupefying drugs where those offences contain a sexual element, being committed with intent to facilitate sexual offences.
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