“if a plaintiff wishes to seek relief against a defendant for misuse of confidential information it is his duty to ensure that the defendant knows what information is in issue. This is not only for the reasons set out by Edmund Davies L.J. in John Zink but for at least two other reasons. First, the plaintiff usually seeks an injunction to restrain the defendant from using its confidential information. Unless the confidential information is properly identified, an injunction in such terms is of uncertain scope and may be difficult to enforce: See for example P.A. Thomas & Co. v. Mould [1968] 2 Q.B. 913 and Suhner & Co. AG v. TransradioLtd. [1967] R.P.C. 329. Secondly, the defendant must know what he has to meet. He may wish to show that the items of information relied on by the plaintiff are matters of public knowledge. His ability to defend himself will be compromised if the plaintiff can rely on matters of which no proper warning was given. It is for all these reasons that failure to give proper particulars may be a particularly damaging abuse of process. “These principles do not apply only to the question of the content of the pleadings. Just as it may be an abuse of process to fail properly to identify the information on which the plaintiff relies, it can be an abuse to give proper particulars but of information which is not, in fact, confidential. A claim based even in part on wide and unsupportable claims of confidentiality can be used as an instrument of oppression or harassment against a defendant. It can be used to destroy an ex-employee's ability to obtain employment or a competitor's ability to compete. The wider the claims, the longer and more expensive the litigation.”
“further or alternatively the Claimant provided the Defendants with a great number of pieces of confidential information (which, taken together, form the single composite piece of confidential information identified above).”
“As to it being allegedly unclear whether any of the matters alleged under paragraph 3 are said to be (i) confidential information or (ii) part of the Big Idea the answer is both: everything in [ACA1] is asserted as being Confidential Information and since those points appear under the heading “The Big Idea”, of course they are said to form part of the Big Idea; The pleading of the Big Idea and the Detail is not “unintelligible”