Sianis & Anor v Barlow

The applicants, Mr and Mrs Sianis, sought special leave to appeal to the High Court of Australia from a decision of the Full Court of the Supreme Court of South Australia. The dispute concerned the assessment of credibility of the plaintiffs by the Full Court on appeal, which had overturned the trial judge's findings in favour of the Sianises. The applicants argued that the Full Court erred in its appreciation and application of the principles governing appeals, particularly in how it reassessed the credibility of the plaintiffs.

The central legal issue before the High Court was whether the Full Court of the Supreme Court of South Australia had correctly exercised its appellate function when it set aside the trial judge's findings of fact, specifically concerning the credibility of the male plaintiff, Mr Sianis. The applicants contended that the appellate judges made their own assessment of credibility, focusing on an incident in the doctor's surgery, which they described as "bizarre and incredible" and "so highly improbable as to beggar belief".

The applicants submitted that the matters identified by the appellate judges as adversely reflecting on the Sianises' evidence were not overlooked or misunderstood by the trial judge, who had made specific findings regarding the incident. They argued that the trial judge's findings were crucial in assessing the appellate judges' exercise in weighing Mr Sianis' credit. The applicants sought special leave to appeal on the grounds that the Full Court's approach to reassessing credibility on appeal was erroneous.