“A proposed amendment must be arguable, carry a degree of conviction, be coherent, properly particularised and supported by evidence that establishes a factual basis for the allegation: see Kawasaki Kisen Kaisha Ltd v James Kemball Ltd[2021] EWCA Civ 33 at [18]. However, whether to be allowed it must show it has “a real prospect of success”, as draws upon the test for summary judgment, depends upon whether the amendment: (i) introduces a new claim or alternatively (ii) provides further particulars, based on factual material, in support of an existing pleaded point. The former will not be permitted if the new allegation carries no reasonable prospect of success. To the contrary, the latter should not invite an assessment whether the particulars have a real prospect of success, these being matters for trial. See Phones 4U Ltd (In Administration) v EE Ltd[2021] EWHC 2816 (Ch) at [11], as followed HH Judge Eyre QC (as he then was), sitting as a judge of the High Court, in Scott v Singh[2020] EWHC 1714 (Comm) at [19] and JFC Plastics Ltd v Motan Colortronic Ltd[2019] EWHC 3959 (Comm) at [14] and [34].”
“the court should still consider very carefully before accepting an invitation to deal with single issues in cases where there will need to be a full trial on liability involving evidence and cross examination in any event, or where summary disposal of the single issue may well delay, because of appeals, the ultimate trial of the action: see Potter LJ in Partco v Wragg[2002] EWCA Civ 594 ;[2002] 2 Lloyds Rep 343 at 27(3) and cases there cited. Removing road blocks to compromise is of course one consideration, but no more than that. Moreover, it does not follow from Lewison J's seventh principle that difficult points of law, particularly those in developing areas, should be grappled with on summary applications; see Partco at 28(7). Such questions are better decided against actual rather than assumed facts. On the other hand it may be possible to say that the trajectory of the law will never on any view afford a remedy: see for example Hudson and others and HM Treasury and another[2003] EWCA Civ 1612 .”
“17. In my judgment, there is no tension whatsoever between these different concluding paragraphs in Lewison J's formulations of the correct approach, both of which are amply supported by authority. The issue of whether a case can properly be disposed of without a trial is one of proper case management and procedural justice. In cases where the relevant law is in a state of incremental development or of uncertainty, a court will for sound practical reasons usually be reluctant to come to any final conclusion on the basis of assumed rather than actual facts. As Mummery LJ observed in Doncaster Pharmaceuticals Group Ltd v The Bolton Pharmaceutical Co 100 Ltd (a case cited by Lewison J): “..there can be more difficulties in applying the "no real prospect of success" test on an application for summary judgment .. than in trying the case in its entirety .. The decision-maker at trial will usually have a better grasp of the case as a whole, because of the added benefits of hearing the evidence tested, of receiving more developed submissions and of having more time in which to digest and reflect on the materials. The outcome of a summary judgment application is more unpredictable than a trial. The result of the application can be influenced more than that of the trial by the degree of professional skill with which it is presented to the court and by the instinctive reaction of the tribunal to the pressured circumstances in which such applications are often made..”
“the overall burden of proof rests on the applicant to establish that there are grounds to believe that the respondent has no real prospect of success and that there is no other reason for a trial… The essential ingredient is the applicant's belief that the respondent has no real prospect of success and that there is no other reason for a trial.”
“If the applicant for summary judgment adduces credible evidence in support of their application, the respondent becomes subject to an evidential burden of proving some real prospect of success or some other reason for a trial. The standard of proof required of the respondent is not high. It suffices merely to rebut the applicant's statement of belief.”
“81. The justification for allowing the parties to bring forward a summary judgment application is the asserted strength of the case against the respondent and the fact that a final trial of at least part of the claim will be disposed of (CPR 24 PD , para 2(3) : " The application notice or the evidence … must – …(b) state that it is made because the applicant believes that on the evidence the respondent has no real prospect of succeeding on the claim or issue or (as the case may be) of successfully defending the claim or issue to which the application relates, and … states that the applicant knows of no other reason why the disposal of the claim or issue should await trial ").”
“… the essential question is whether A or X, the alleged influencer, “is in a position to influence [B] into effecting the transaction of which complaint is later made”
“The existence of a relationship of influence between B and A or X shows that it is possible that B was subject to undue influence when entering into a particular transaction. A presumption of undue influence will arise only if, in relation to that specific transaction, there is “something more … something which calls for an explanation”
“If a court finds that there is a relationship of influence and a transaction calling for explanation, the doctrine of undue influence will apply unless A can show that, in fact, B’s entry into that transaction was not procured by undue influence. To do so, A must present evidence to justify a finding that, in relation to the transaction in question, B was in fact sufficiently229 independent of A and so was able to, and did, consent to the transaction free from any undue influence. The presumption of undue influence arises only if there is no explanation for B’s entry into the transaction other than the exertion of undue influence, so, technically, evidence rebutting the presumption does not go to the question of whether there was an understandable reason for which B entered the transaction, but to the different question of whether B’s admittedly poor decision-making was the product of undue influence. A must convince the court that B’s decision to enter the transaction was made as a result of “full, free and informed thought about it”
“[t]he gift or transaction will be set aside, unless it is proved to have been the spontaneous act of the donor or grantor acting in circumstances which enable him to exercise an independent will and which justify the court in holding that the gift or transaction was the result of a free exercise of his will.”