Lord Sumption JSC in Brownlie v Four Seasons Holdings Inc

On an application for permission to serve a claim out of the jurisdiction the claimant must show a good arguable case that the claim falls within a jurisdictional gateway (CPR PD 6B para 3.1), a reasonable prospect of success on the merits, and that England is the proper place to bring the claim; 'good arguable case' for the gateway means a plausible (albeit contested) evidential basis on which the claimant has the better of the argument.