"(1) Where it appears to the court that there is a good reason to authorise service by a method or at a place not otherwise permitted by this Part, the court may make an order permitting service by an alternative method or at an alternative place. (2) On an application under this rule, the court may order that steps already taken to bring the claim form to the attention of the defendant by an alternative method or at an alternative place is good service."
"Where the court gives permission to serve a claim form out of the jurisdiction - (a) it will specify the periods within which the defendant may (i) file acknowledge and service", et cetera -- that is not the provision directly in point here -- and "(b) it may - (i) give directions about the method of service; and (ii) give permission for other documents in the proceedings to be served out of the jurisdiction."