Tabbaa v Nine Network Australia Pty Ltd

The appeal concerned allegations of apprehended bias arising from the conduct of the trial judge, who read evidence from one witness to another. The plaintiffs, Mouhammad Tabbaa and Pamela June Tabbaa, alleged this conduct suggested the judge had already accepted the evidence as true, leading to a reasonable apprehension of bias. The defendants, Nine Network Australia Pty Ltd, also raised points of law regarding the defence of honest opinion under section 31 of the Defamation Act 2005 (NSW), including whether the "public interest" element was satisfied and whether the opinion provided a defence to the whole of the defamatory matter. The court was required to determine if these issues constituted a substantial miscarriage of justice warranting a retrial.

The Court of Appeal, comprising Basten, Gleeson, and Payne JJA, considered whether the judge's conduct in reading evidence to a witness could lead a fair-minded and informed observer to apprehend bias. It also examined whether the plaintiffs had been afforded a reasonable opportunity to challenge a legal submission made by the defendant, and whether they were bound by their counsel's conduct at trial. Furthermore, the court assessed whether the trial judge had erred in upholding the "public interest" element of the honest opinion defence and whether the finding that the opinion was not a complete defence had been correctly applied. Finally, the court reviewed the trial judge's decision regarding damages, specifically whether any award should have been made for defamatory imputations and whether damages were aggravated by the knowledge of the falsity of the statements.

The Court of Appeal dismissed the appeals brought by both Mouhammad Tabbaa and Pamela June Tabbaa. The judges found no apprehended bias in the trial judge's conduct, concluding that a reasonable observer would not have formed such an apprehension. The court also determined that the plaintiffs had been afforded a reasonable opportunity to challenge the defendant's legal submissions and were bound by their counsel's actions at trial. The trial judge's findings regarding the honest opinion defence, including the satisfaction of the "public interest" element and its scope, were upheld. Consequently, the court found no substantial miscarriage of justice. The plaintiffs were ordered to pay the costs of the respondent.