Workers Compensation (Dust Diseases) Board of NSW v Smith, Munro and Seymour

The Workers Compensation (Dust Diseases) Board of NSW appealed to the Court of Appeal of New South Wales against decisions of the District Court which had awarded compensation to the respondents, Mr Smith, Mr Munro, and Mr Seymour, who were suffering from lung cancer. The Board contended that the District Court had erred in law in its findings regarding causation and the admissibility of evidence.

The primary legal issues before the Court of Appeal were whether the District Court had erred in law by: (a) finding that the respondents' lung cancer was caused by exposure to asbestos, in combination with their smoking, without adequately explaining the factual basis for this finding; (b) admitting certain affidavit evidence from deceased claimants; and (c) failing to make an explicit ruling on an objection to that evidence. The Court also considered the interpretation of section 8(1)(b) of the *Workers' Compensation (Dust Diseases) Act 1942* (NSW), specifically the meaning of "reasonably attributable to" in the context of a dust disease.

The Court of Appeal dismissed the appeals, finding that the District Court's decisions were not erroneous in law. Regarding the adequacy of reasons, the Court held that while the District Court's findings on causation were not elaborated with arithmetical precision, they were sufficiently reasoned given the nature of the evidence and the statutory provisions. The Court found that the affidavit evidence was admissible and that any potential unfair prejudice did not outweigh its probative value under section 135 of the *Evidence Act 1995* (NSW). The Court also determined that the District Court's interpretation of section 8(1)(b) of the *Workers' Compensation (Dust Diseases) Act 1942* was correct, holding that the phrase "reasonably attributable to" did not require a normative assessment but rather a factual connection, and that the exposure to asbestos constituted a material contribution to the respondents' lung cancer.

Consequently, the Court of Appeal ordered that each of the appeals be dismissed and that the appellant pay the respondents’ costs of the appeals.