"In Re Maxwell at 761-2 Hoffmann J observed that the theory that an anti-suit injunction is not an intended interference with the affairs of a foreign court, because it merely operates in personam upon a person subject to the jurisdiction of the English court, is a more realistic description in some cases than in others. It is a fair description where the injunction is intended to enforce a contractual submission to the exclusive jurisdiction of the English court. But where the court is not enforcing a contractual right under English law, the normal assumption is that an English court has no superiority over a foreign court in deciding what justice between the parties requires and, in particular, that both comity and common sense suggest that the foreign judge is usually the best person to decide whether in his own court he should accept or decline jurisdiction, stay proceedings or allow them to continue. In other words, there must be a good reason why the decision to stop the foreign proceedings should be made by an English judge rather than a foreign judge, and cases where justice requires the English court to intervene will be exceptional. Hoffmann J recognised that exceptional cases cannot be categorised, but he instanced cases where a foreign court has by its own jurisprudence a long arm jurisdiction so extensive that to English notions it appears contrary to accepted principles of international law, and where the English court may feel it necessary to intervene by injunction to protect a party from the injustice of having to litigate in a jurisdiction with which he or the subject matter had little connection. There may also be cases in which the judicial or legislative policies of England and the foreign court are so at variance that comity is overridden by a need to protect British interests or to prevent what the English court regards as a violation of the principles of customary international law."