“(1) Unless the court orders otherwise, a claimant who discontinues is liable for the costs which a defendant against whom the claimant discontinues incurred on or before the date on which notice of discontinuance was served on the defendant.”
'Taking into account what is fair and just, I take into account the following matters: whether the application by the defendant can be safely equated with defeat or an acknowledgment of defeat, whether the proceedings have in some way become academic, whether the claimant has obtained some legitimate benefit from the proceedings which it might not otherwise have obtained, what the economic value of the claim is, what the potential benefits of the claim might be, what the strength of the claim on a very prima facie basis is, not so as to conduct a mini-trial but simply to see whether there was a reasonable basis for the claim and a continuing reasonable basis for the claim.' [26]In making that list of the matters which he took into account, the judge made no reference to the relevance of any change (or not) in circumstances between the date when the proceedings were started and the date when the application to discontinue was made or the decision to discontinue was taken. In other words, he left out of account any consideration as to why a claim which was started on the basis of certain expectations should be discontinued without an order for costs against the claimant in circumstances where the expectations have not, in fact, changed—even though they may have been re-evaluated.” (See Chadwick LJ at paras 24-26); '