“Where a party has had many months to consider how he wants to put his case and where it is not by virtue of some new factor appearing from some disclosure only recently made, why, one asks rhetorically, should he be entitled to cause the trial to be delayed so far as his opponent is concerned and why should he be entitled to cause inconvenience to other litigants? The only answer which can be given and which, [counsel] for Worldwide has suggested, applies in the instant case is that without the amendmenta serious injustice may be done because the new case is the only way the case can be argued, and it raises the true issue between the parties which justice requires should be decided. We accept that at the end of the day a balance has to be struck. The court is concerned with doing justice, but justice to all litigants, and thus where a last minute amendment is sought with the consequences indicated, the onus will be a heavy one on the amending party to show the strength of the new case and why justice both to him, his opponent and other litigants requires him to be able to pursue it.”
“ … I do accept that the court is and should be less ready to allow a very late amendment than it used to be in former times, and that a heavy onus lies on a party seeking to make a very late amendment to justify it, as regards his own position, that of the other parties to the litigation, and that of other litigants in other cases before the court.”
“The matters which need to be considered for this purpose include the terms of the amendment, the previous history as regards amendment, including the sequence of events [at the time in that case] which led to the first amendments, the absence of any evidence explaining why the re-amendment was sought to be made so very late, and the various factors relevant to prejudice to each side.”