Article 9U.K.Jurisdiction based on appearance
1.Where, in the course of proceedings before a court of a Member State exercising jurisdiction pursuant to Article 7, it appears that not all the parties to those proceedings were party to the choice-of-court agreement, the court shall continue to exercise jurisdiction if the parties to the proceedings who were not party to the agreement enter an appearance without contesting the jurisdiction of the court.
2.If the jurisdiction of the court referred to in paragraph 1 is contested by parties to the proceedings who were not party to the agreement, the court shall decline jurisdiction.
In that event, jurisdiction to rule on the succession shall lie with the courts having jurisdiction pursuant to Article 4 or Article 10.