"If, on an application under this Rule, the court does not make a declaration (a) the acknowledgment of service shall cease to have effect and (b) the defendant may file a further acknowledgment of service within 14 days or such other period as the court may direct."
"If the defendant files a further acknowledgment of service, in accordance with paragraph 7(b), he shall be treated as having accepted that the court has jurisdiction to try the claim."
"A claimant may not apply for summary judgment until the defendant against whom the application is made has filed (a) an acknowledgment of service or (b) a defence unless (i) the court gives permission or (ii) a practice direction provides otherwise."
"Under the current Order 12, however, that previous procedure has been changed, and one of the purposes of the change was to give a foreign defendant who wished to challenge the jurisdiction a real opportunity to decide whether or not to submit to the jurisdiction of the English court after his challenge to the jurisdiction had been heard and decided."
"When, therefore, a challenge to jurisdiction fails, if it does, the defendant has another 14 days to decide whether it wishes to submit to the jurisdiction by lodging a further acknowledgment of service. At that point, the defendant may prefer (as the Philadelphia Chewing Gum Corporation had sought to do) to allow the action to proceed against it by default on the basis that it has no assets within the jurisdiction and no intention of bringing assets within the jurisdiction and that without its submission to the jurisdiction a default judgment rendered against it in England cannot be enforced against it in its home jurisdiction."
"For these reasons, the philosophy and the language of the new post-1979 Order 12 are at one. Judgment cannot be obtained against a defendant who has unsuccessfully challenged jurisdiction under Order 12, Rule 8 until that defendant has been given a further opportunity to decide whether he wishes to submit to the jurisdiction by lodging a further acknowledgment of service, and that is equally so of summary judgment as of default judgment. Indeed, if it were otherwise, the defendant who was challenging the jurisdiction of the court would be compelled to prepare not only submissions but also evidence to meet a claim for summary judgment at a time when he was saying that the court had no jurisdiction over him. That might not be unacceptable where the challenge to jurisdiction fails, but it is plainly contrary to principle where the challenge is a valid one and, at the time when preparations would have to be put in hand, it would not be known whether the challenge would succeed or fail. It may seem unfortunate to a plaintiff with an unanswerable claim that a foreign defendant may hold up summary judgment first by a challenge to the jurisdiction and then by insisting on a further period to lodge his second acknowledgment of service. That, however, is the price such a plaintiff must pay out of regard for all those foreign defendants who, for reasons of comity, are to be allowed to challenge the jurisdiction of these courts without prejudicing or pre-empting their defence on the merits or their decision as to whether, if their jurisdictional challenge fails, they wish nevertheless to submit to the jurisdiction of the English courts."
"The answer ought to be, in general at least, that is not open to him. Although it is obvious that if the defendant feels compelled to put in evidence in answer to the application for summary judgment this cannot be seen as submission on his part, it is contrary to principle that a defendant who contends that the court has no jurisdiction over him should be drawn into an investigation of, or a contest in relation to, the merits of the claim. There is nothing clear in the rules to prevent an application from being made on these grounds. Although as the acknowledgment of service -- the finding of which is a precondition of seeking summary judgment under Part 24 -- will certainly lapse at the determination of the application to dispute the jurisdiction, and it would be a welcome step for a court to rule that an acknowledgment of service which has been followed by an application underCPR Part 12 is not to be seen as an acknowledgment of service for the purposes of an application for summary judgment, at the very least the court will presumably be obliged to hear the jurisdictional challenge before the application for summary judgment, even if the claimant has contrived to have his application listed earlier or at the same time."