F Firm & Ruane and Ors

The case of F Firm & Ruane and Others involved a dispute that was before the court to determine whether certain claims could be heard together under the court's jurisdiction. The matter was heard by Murphy J and subsequently appealed to the Full Court. The central issue in the case was whether the existence of a "common substratum of facts" between the wife's claim and the husband's cross-claim was sufficient to attract the court's jurisdiction, or if there needed to be a more stringent requirement of a single justiciable controversy. The wife argued that once a common substratum of facts was identified, the court's jurisdiction was automatically engaged. This argument was based on several High Court precedents, including Fencott v Muller and Philip Morris Inc v Adam P Brown Male Fashions Pty Ltd.

The Full Court, however, took the view that while a common substratum of facts was a useful guide, it was not determinative of the court's jurisdiction. Instead, the court needed to ascertain whether the claims were so interdependent that they constituted one controversy. The court referenced the judgment in Wakim, where it was emphasised that identifying the central justiciable matter was crucial. The Full Court thus distinguished between a common substratum of facts and the necessity of a single controversy to engage the court's jurisdiction.

In granting leave to appeal but dismissing the appeal, the court acknowledged the importance of the wife's arguments but ultimately upheld the Full Court's reasoning. The court found that the Full Court was correct in requiring more than just a common substratum of facts to determine jurisdiction. The final orders of the court included granting leave to appeal, dismissing the appeal, and setting a timeline for the parties to file and serve written submissions regarding costs.