Certain Lloyd's Underwriters Subscribing to Contract No IH00AAQS v Cross; Certain Lloyd's Underwriters Subscribing to Contract No IH00AAQS v Thelander; Certain Lloyd's Underwriters Subscribing to Contract No...

The High Court of Australia considered appeals from decisions of the Supreme Court of New South Wales concerning the interpretation of an insurance contract. The appellants, certain Lloyd's underwriters, sought to avoid liability under a policy of insurance, arguing that the insured, Mr. Cross and Mr. Thelander, had failed to disclose material facts relevant to the risk being insured. The underwriters contended that this non-disclosure entitled them to avoid the policy.

The central legal issue before the High Court was whether the underwriters had validly avoided the policy of insurance. This required the Court to determine whether the insureds had breached their duty of disclosure under the *Insurance Contracts Act 1984* (Cth) and, if so, whether the underwriters had acted within their rights to avoid the policy. Specifically, the Court had to consider the scope of the duty of disclosure and the circumstances under which an insurer could rely on non-disclosure to repudiate liability.

The High Court, in a joint judgment delivered by French CJ, found that the underwriters had not validly avoided the policy. The Court held that the underwriters had not established that the undisclosed facts were material to the risk. Applying the principles of contract law and the *Insurance Contracts Act*, the Court emphasised that an insurer seeking to avoid a policy for non-disclosure bears the onus of proving that the undisclosed information was such that a reasonable person in the circumstances of the insured would have been aware of its relevance and that it would have influenced the judgment of a prudent insurer in deciding whether to accept the risk and on what terms. The Court concluded that the underwriters had failed to discharge this onus.