“(1) This rule applies where – (a) a party applies to amend his statement of case in one of the ways mentioned in this rule; and (b) a period of limitation has expired under – (i) theLimitation Act 1980 ; … (2) The court may allow an amendment whose effect will be to add or substitute a new claim, but only if the new claim arises out of the same facts or substantially the same facts as a claim in respect of which the party applying for permission has already claimed a remedy in the proceedings.”
“ In the quest for what constitutes a "new" cause of action, i.e. a cause of action different from that already asserted, it is the essential factual allegations upon which the original and the proposed new or different claims are reliant which must be compared. Thus "the pleading of unnecessary allegations or the addition of further instances or better particulars do not amount to a distinct cause of action" - see Paragon Finance v Thakerar[1999] 1 All ER 400 at 405 per Millett LJ. "So in identifying a new cause of action the bare minimum of essential facts abstracted from the original pleading is to be compared with the minimum as it would be constituted under the amended pleading " - see per Robert Walker LJ in Smith v Henniker-Major[2003] Ch 182 at 210.”
“64. Thus the addition or substitution of a new loss is by no means necessarily the addition or substitution of a new cause of action. For a cause of action to arise in tort there must be a breach of duty which causes loss but it is permissible to add or substitute further losses if they all stem from an original breach of duty which has caused some loss. This happens every day in personal injury claims in which a loss of earnings claim may be added to (or substituted for) a claim for loss and suffering, even after the original time bar has expired; there is no question of a new cause of action being added or substituted because the loss all stems from the negligent act of the car driver or other tortfeasor: see, for example, Stock v London Underground Ltd The Times,13 August 1999 ; [1999] CA Transcript No 1412, per Peter Gibson LJ, at pp 7—8; Savings and Investment Bank Ltd v Fincken[2001] EWCA Civ 1639 at [38], also per Peter Gibson LJ and Aldi Stores Ltd v Holmes Buildings plc [2005] PNLR 136, para 28, per Dyson LJ.”
“I do not think that Aldi’s case goes quite as far as Mr Nugee submits. I would, however, agree with him to this extent: I consider that his proposition is correct provided that the substance of the new claim can be pleaded simply as a consequence of the facts originally pleaded. For example, in a case of negligent advice, it is permissible to expand the relief to claim further loss arising as a consequence of actions taken in reliance upon the advice where those actions and reliance were pleaded in the original claim. But the limits of the proposition must be kept carefully in mind; the court must be satisfied that the amendment to the pleaded case is simply to add a new head of loss and not to introduce, for example, a new act of negligence which is relied on other than as part of the chain of causation leading from the original breach.”
“4. In summary, our view is that (i) the scope of duty question should be located within a general conceptual framework in the law of the tort of negligence; (ii) the scope of the duty of care assumed by a professional adviser is governed by the purpose of the duty, judged on an objective basis by reference to the purpose for which the advice is being given (in the context of this judgment, we use the expression “purpose of the duty” in this sense); … 6. .. When a claimant seeks damages from a defendant in the tort of negligence, a series of questions arise: (1) Is the harm (loss, injury and damage) which is the subject matter of the claim actionable in negligence? (the actionability question) (2) What are the risks of harm to the claimant against which the law imposes on the defendant a duty to take care? (the scope of duty question) (3) Did the defendant breach his or her duty by his or her act or omission? (the breach question) (4) Is the loss for which the claimant seeks damages the consequence of the defendant’s act or omission? (the factual causation question) (5) Is there a sufficient nexus between a particular element of the harm for which the claimant seeks damages and the subject matter of the defendant’s duty of care as analysed at stage 2 above? (the duty nexus question) (6) Is a particular element of the harm for which the claimant seeks damages irrecoverable because it is too remote, or because there is a different effective cause (including novus actus interveniens) in relation to it or because the claimant has mitigated his or her loss or has failed to avoid loss which he or she could reasonably have been expected to avoid? (the legal responsibility question).” 17. Therefore, in our view, in the case of negligent advice given by a professional adviser one looks to see what risk the duty was supposed to guard against and then looks to see whether the loss suffered represented the fruition of that risk.”
"Whether one factual basis is 'substantially the same' as another factual basis obviously involves a value judgment, but the relevant criteria must clearly have regard to the main purpose for which the qualification to the power to give permission to amend is introduced. That purpose is to avoid placing a defendant in the position where if the amendment is allowed he will be obliged after expiration of the limitation period to investigate facts and obtain evidence of matters which are completely outside the ambit of, and unrelated to those facts which he could reasonably be assumed to have investigated for the purpose of defending the unamended claim." "
“On an application by a party to amend its pleading, where there is no issue of lateness or adverse impact on the trial date, the principles can be summarised as follows (see the White Book notes at paragraphs 17.3.5 and 17.3.6): i) When deciding whether to grant permission to amend, the court must exercise its discretion having regard to the overriding objective. ii) Applications always involve the court striking a balance between injustice to the applicant if the amendment is refused, and injustice to the opposing party and other litigants in general, if the amendment is permitted. iii) Although the court will have regard to the desirability of determining the real dispute between the parties, it must also deal with the case justly and at proportionate cost, which includes (amongst other things) saving expense, ensuring that the case is dealt with expeditiously and fairly, and allocating to it no more than a fair share of the court's limited resources. iv) An application to amend will be refused if it is clear that the proposed amendment has no real prospect of success: SPR North Ltd v Swiss Post International (UK) Ltd[2019] EWHC 2004 (Ch) . The court must consider whether the claimant has a "realistic" as opposed to a "fanciful" prospect of success: Swain v Hillman[2001] 1 All ER 91 . A "realistic" claim is one that carries some degree of conviction. This means a claim that is more than merely arguable: ED & F Man Liquid Products v Patel[2003] EWCA Civ 472 . In reaching its conclusion the court must not conduct a "mini-trial": Swain v Hillman.”