CGU Insurance Limited v Porthouse

CGU Insurance Limited (CGU) appealed to the High Court of Australia from a decision of the Full Federal Court concerning the interpretation of a professional indemnity insurance policy. The dispute arose from a claim made by Porthouse against its former solicitors, who were insured by CGU. Porthouse alleged that the solicitors had provided negligent advice regarding a property development project, leading to significant financial losses. CGU denied liability under the policy, asserting that the claim was excluded by certain policy conditions.

The High Court was required to determine whether the professional indemnity insurance policy issued by CGU to the solicitors covered the claim made by Porthouse. Specifically, the Court had to consider whether the claim fell within an exclusion clause in the policy that related to "any claim arising out of or in connection with any joint venture or partnership." The central legal question was the proper construction of this exclusion clause and whether Porthouse's claim, which involved advice given in relation to a property development project where the solicitors had a financial interest, constituted a claim "arising out of or in connection with" a joint venture or partnership.

The High Court, in a joint judgment, held that the exclusion clause was not confined to formal joint ventures or partnerships but extended to arrangements that had the essential characteristics of such enterprises, even if not formally constituted. Their Honours reasoned that the property development project, involving shared risk and reward between the solicitors and other parties, bore the hallmarks of a joint venture. Consequently, the claim made by Porthouse arose out of or in connection with this arrangement, and was therefore excluded from coverage under the policy. The Court allowed CGU's appeal.