After a fire broke out in a power plant in Russia, Chubb Russia, the insurers of the plant’s owners brought proceedings in Russia against Enka, a subcontractor, alleging liability for the fire. Enka began proceedings in England contending that the dispute was subject to an arbitration agreement in the contract under which it had performed the works, and seeking an order that Chubb Russia discontinue the Russian Proceedings ("an anti-suit injunction"). Enka’s claim was dismissed by the High Court at first instance at an expedited trial. The Court of Appeal subsequently allowed Enka’s appeal, granting an anti-suit injunction and restraining Chubb Russia from appealing the decision of the Russian court. Chubb Russia seeks to appeal.

The cases concern a number of patents, which are declared to be essential to the practice of numerous telecommunications standards, held by the Respondents in both sets of proceedings, who commenced proceedings against the respective Appellants for infringing those patents. The Respondents are under an obligation to make available standard essential patents ("SEPs") on fair, reasonable and non-discriminatory terms ("FRAND") terms.
In Unwired, two of Unwired’s patents were found to be valid and essential to the standards, and Unwired obtained an injunction against Huawei for the latter’s infringement of the SEPs. Huawei, with the permission of the first-instance judge, appealed to the Court of Appeal on three grounds, namely Issues (1), (3) and (4). Huawei’s appeal was dismissed and Huawei now appeals to the Supreme Court.
The proceedings in Conversant were brought after the High Court judgment was handed down in Unwired. The defendants in the Conversant proceedings challenged the jurisdiction of the English court, raising issues (1) and (2). The application was dismissed but Huawei and ZTE appealed to the Court of Appeal. The appeal was dismissed and Huawei and ZTE now appeal to the Supreme Court.

The cases concern a number of patents, which are declared to be essential to the practice of numerous telecommunications standards, held by the Respondents in both sets of proceedings, who commenced proceedings against the respective Appellants for infringing those patents. The Respondents are under an obligation to make available standard essential patents ("SEPs") on fair, reasonable and non-discriminatory terms ("FRAND") terms.
In Unwired, two of Unwired’s patents were found to be valid and essential to the standards, and Unwired obtained an injunction against Huawei for the latter’s infringement of the SEPs. Huawei, with the permission of the first-instance judge, appealed to the Court of Appeal on three grounds, namely Issues (1), (3) and (4). Huawei’s appeal was dismissed and Huawei now appeals to the Supreme Court.
The proceedings in Conversant were brought after the High Court judgment was handed down in Unwired. The defendants in the Conversant proceedings challenged the jurisdiction of the English court, raising issues (1) and (2). The application was dismissed but Huawei and ZTE appealed to the Court of Appeal. The appeal was dismissed and Huawei and ZTE now appeal to the Supreme Court.