“(1) The High Court may by order (whether interlocutory or final) grant an injunction or appoint a receiver in all cases in which it appears to the court to be just and convenient to do so. (2) Any such order may be made either unconditionally or on such terms and conditions as the court thinks just.”
“The broad principle underlying the jurisdiction is that it is to be exercised when the ends of justice require it.”
“Counsel have been unable to locate any reported cases in the field of children in which the use of the jurisdiction has been argued. In Hallam v Hallam [1992] 2 FCR 197, sub nom H v H (minors) (forum conveniens) (Nos 1 and 2)[1993] 1 FLR 958 and Hallam v Hallam (No 2) [1992] 2 FCR 205, Waite J made an anti-suit injunction to prevent the father continuing to litigate in the USA after Waite J had determined England was the appropriate forum. He assumed the jurisdiction existed.”
"(1) Under English law the court may restrain a defendant over whom it has personal jurisdiction from instituting or continuing proceedings in a foreign court when it is necessary in the interests of justice to do. (2) It is too narrow to say that such an injunction may be granted only on the grounds of vexation or oppression, but, where a matter is justiciable in England and a foreign court, the party seeking an anti-suit injunction must generally show that proceeding before the foreign court is or would be vexatious or oppressive. (3) The courts have refrained from attempting a comprehensive definition of vexation or oppression, but in order to establish that proceeding in a foreign court is or would be vexatious or oppressive on grounds of forum non conveniens, it is generally necessary to show that (a) England is clearly the more appropriate forum ("the natural forum"), and (b) justice requires that the claimant in the foreign court should be restrained from proceeding there. (4) If the English court considers England to be the natural forum and can see no legitimate personal or juridical advantage in the claimant in the foreign proceedings being allowed to pursue them, it does not automatically follow that an anti-suit injunction should be granted. For that would be to overlook the important restraining influence of considerations of comity. (5) An anti-suit injunction always requires caution because by definition it involves interference with the process or potential process of a foreign court. An injunction to enforce an exclusive jurisdiction clause governed by English law is not regarded as a breach of comity, because it merely requires a party to honour his contract. In other cases, the principle of comity requires the court to recognise that, in deciding questions of weight to be attached to various factors, different judges operating under different legal systems with different legal policies may legitimately arrive at different answers, without occasioning a breach of customary international law or manifest injustice, and that in such circumstances it is not for an English court to arrogate to itself the decision how a foreign court should determine the matter. The stronger the connection of the foreign court with the parties and the subject matter of the dispute, the stronger the argument againstintervention. (6) The prosecution of parallel proceedings in different jurisdictions is undesirable but not necessarily vexatious or oppressive."