“(1) The threshold test for permission to amend is the same as that applied in summary judgment applications: Elite Property Holdings Ltd -v- Barclays Bank plc[2019] EWCA Civ 204 [40]-[42] per Asplin LJ (“the merits test”). (2) Amendments sought to be made to a statement of case must contain sufficient detail to enable the other party and the Court to understand the case that is being advanced, and they must disclose reasonable grounds upon which to bring or defend the claim: Habibsons Bank Ltd -v- Standard Chartered Bank (HK) Ltd[2011] QB 943 [12] per Moore-Bick LJ. (3) The court is entitled to reject a version of the facts which is implausible, self-contradictory, or not supported by the contemporaneous documents. It is appropriate for the court to consider whether the proposed pleading is coherent and contains the properly particularised elements of the cause of action or defence relied upon: Elite Property Holdings Ltd [42] per Asplin LJ. (4) In addition to being coherent and properly particularised, the pleading must be supported by evidence which establishes a proper factual basis which meets the merits test: Zu Sayn-Wittgenstein -v- Borbón y Borbón[2023] 1 WLR 1162 [65] per Simler LJ. (5) In an area of law which is developing, and where its boundaries are drawn incrementally based on decided cases, it is not normally appropriate summarily to dispose of the claim or defence. In such areas, development of the law should proceed on the basis of actual facts found at trial and not on the basis of hypothetical facts assumed to be true on an application to strike out: Farah -v- British Airways plc[1999] EWCA Civ 3052 [42]-[43] per Chadwick LJ.”
“[A]n application for permission to amend particulars of claim will be refused if the amendments put forward a new case which would have “no real prospect of succeeding” within the meaning ofCPR Part 24 . Beyond that, the Court has to strike a balance between the interests of the applicant and those of other parties and litigants more generally: “[i]n essence, the court must, taking account of the overriding objective, balance the injustice to the party seeking to amend if it is refused permission, against the need for finality in litigation and the injustice to the other parties and other litigants, if the amendment is permitted” (Nesbit Law Group LLP v. Acasta European Insurance Company Ltd[2018] EWCA Civ 268 , at [41] per Vos LJ). Aside from very late amendments, we do not think the perceived strength of the case is normally a factor to be taken into account when undertaking that balancing exercise.
“a review of the nature of the proposed amendment, the quality of the explanation for its timing, and a fair appreciation of the consequences in terms of work wasted and consequential work to be done”