“The most that can be said by way of generalization is that a party’s knowledge of essential facts may lessen the amount of evidence required to discharge an evidential burden borne by his adversary. To quote Lord Mansfield “It is certainly a maxim that all evidence is to be weighed according to the proof which it was in the power of one side to produce, and in the power of the other to have contradicted”
“It is not sufficient to show that nobody has been hurt by the delay, as that is not the reason for the delay. Even if it be assumed that it be a reason, it is not a reasonable reason in that it disregards the public interest in ensuring that patents are amended promptly, when the need arises, so that the public can rely on patents as representing that to which the patentee believes he is entitled.”
“In the result I would dismiss this appeal. I would only add that it is probably time these provisions were reconsidered. It makes no sense, for instance, to restrict the right to damages but not the right to an account of profits (see Codex v Racal-Milgo[1983] RPC 369 ). Nor does it seem sensible to let a defendant off damages or an account unless he has actually relied upon something done by the patentee. Whether the provisions comply with the Directive on the Enforcement of Intellectual Property Rights 2004/48/EC is also a matter to be explored, but not here.”
“The difficulty in the application of the criterion used by Part 24 is that it requires an assessment to be made in advance of a full trial as to what the outcome of such a trial would be. The pre-trial procedures give the claimant an opportunity to obtain additional evidence to support his case. The most obvious of these is discovery of documents but there is also the weapon of requesting particulars or interrogatories and the exchange of witness statements may provide a party with additional important material. Therefore the courts have in the present case recognised that they must have regard not only to the evidence presently available to the plaintiffs but also to any realistic prospect that that evidence would have been strengthened between now and the trial. Indeed, it was the submission of Mr Stadlen QC for the defendants that Clarke J had applied the right test when he said: "In my judgment the question in the instant case is whether the Bank has persuaded the court that the plaintiffs' case is bound to fail on the material at present available and that there is no reasonable possibility of evidence becoming available to the plaintiff, whether by further investigation, discovery, cross-examination or otherwise sufficiently to support their case and to give it some prospect of success. If the Bank discharges that burden, it will follow that the plaintiffs' claim is bound to fail. In that event to allow the action to proceed would serve no useful purpose. It would only involve the expenditure of time and money - in this case a very great deal of both. Neither party would have any legitimate interest in such expenditure because it could not benefit either." (p.6-7) It is possible that this test, in its reference to cross-examination, may be rather too favourable to the plaintiffs. It is derived from what was said in relation to a plea of justification by Neill LJ in McDonald's Corporation v Steel [1995] 3 AER 615, a defamation action. He included cross-examination no doubt because in a defamation action, although the burden of proving justification is upon the defendant, the publisher of the libel, it is normal for the plaintiff to call his evidence first; justification is a defence. Where an allegation of dishonesty is being made as part of the cause of action of the plaintiff, there is no reason why the rule should not apply that the plaintiff must have a proper basis for making an allegation of dishonesty in his pleading. The hope that something may turn up during the cross-examination of a witness at the trial does not suffice. It is of course different if the admissible material available discloses a reasonable prima facie case which the other party will have to answer at the trial.”