It’s one thing to lose a high-profile antitrust lawsuit targeting a tech behemoth on the merits of the case; having a judge rule against you for missing deadlines is another. Yet a procedural stumble was enough to place the UK’s Competition and Markets Authority on the receiving end of a court ruling that upended its probe of Apple’s mobile browser and cloud-gaming services. The recent ruling of the Competition Appeal Tribunal in Apple’s favor was a reminder that, whatever its motives, the regulator can’t escape statutory obligations over procedure.