I also reject Mr Ravi’s submission that he was only taking a “cautious procedural approach” by filing the OS under O 53. An applicant for judicial review who seeks prerogative relief is limited to proceeding under O 53. On the other hand, an applicant who seeks declaratory relief is not so constrained – he may still proceed under O 53 if he wishes to also obtain prerogative relief by the same application, but if not, he may simply proceed under O 15 r 16 with less hassle (see Vellama ([30] above) at [53]). It would only have been open to the defendant to argue that the plaintiffs were circumventing O 53 if the relief which the plaintiffs were seeking leaves them with O 53 as the only available procedural option - that is, if they were seeking some form of prerogative relief in the OS. Conversely, if the plaintiffs were only seeking declarations but not any form of prerogative relief (as it was the case here, and which Mr Ravi well knew), there would have been no basis for the defendant to make that same argument because the plaintiffs’ procedural options would not have been similarly limited. If indeed Mr Ravi was genuinely in any doubt as to whether the defendant would take up any procedural objections about his preferred course of applying for the intended declaratory relief under O 15 r 16 rather than under O 53, he could have written to the defendant, before filing the OS, to seek clarification of the defendant’s position. Regrettably, this was not done.