The appellant appealed his conviction for sexual assault.
At trial, the central issue was whether the complainant consented.
The trial judge instructed the jury that even if the complainant consented, the appellant could be found guilty if she lacked the capacity to consent due to intoxication.
However, the trial judge refused to instruct the jury on the defence of honest but mistaken belief in consent.
The Court of Appeal held that once the trial judge introduced the issue of capacity, fairness required instructing the jury on mistaken belief in consent, especially given the substantial alcohol consumption by both parties.
The appeal was allowed and a new trial ordered.