“39. There is now a considerable body of authority setting out the lessons of experience and of science in relation to the judicial determination of facts. Recent first instance authorities include Gestmin SGPS SA v Credit Suisse (UK) Ltd[2013] EWHC 3650 (Comm) (Leggatt J, as he then was) and two decisions of Mostyn J: Lachaux v Lachaux[2017] EWHC 385 (Fam) [2017] 4 WLR 57 and Carmarthenshire County Council v Y[2017] EWFC 36 [2017] 4 WLR 136 . Key aspects of this learning were distilled by Stewart J in Kimathi v Foreign and Commonwealth Office[2018] EWHC 2066 (QB) [96]: "i) Gestmin : • We believe memories to be more faithful than they are. Two common errors are to suppose (1) that the stronger and more vivid the recollection, the more likely it is to be accurate; (2) the more confident another person is in their recollection, the more likely it is to be accurate. • Memories are fluid and malleable, being constantly rewritten whenever they are retrieved. This is even true of "flash bulb" memories (a misleading term), i.e. memories of experiencing or learning of a particularly shocking or traumatic event. • Events can come to be recalled as memories which did not happen at all or which happened to somebody else. • The process of civil litigation itself subjects the memories of witnesses to powerful biases. • Considerable interference with memory is introduced in civil litigation by the procedure of preparing for trial. Statements are often taken a long time after relevant events and drafted by a lawyer who is conscious of the significance for the issues in the case of what the witness does or does not say. • The best approach from a judge is to base factual findings on inferences drawn from documentary evidence and known or probable facts. "This does not mean that oral testimony serves no useful purpose… But its value lies largely… in the opportunity which cross-examination affords to subject the documentary record to critical scrutiny and to gauge the personality, motivations and working practices of a witness, rather than in testimony of what the witness recalls of particular conversations and events. Above all, it is important to avoid the fallacy of supposing that, because a witness has confidence in his or her recollection and is honest, evidence based on that recollection provides any reliable guide to the truth". “ii) Lachaux : • Mostyn J cited extensively from Gestmin and referred to two passages in earlier authorities. I extract from those citations, and from Mostyn J's judgment, the following: • "Witnesses, especially those who are emotional, who think they are morally in the right, tend very easily and unconsciously to conjure up a legal right that did not exist. It is a truism, often used in accident cases, that with every day that passes the memory becomes fainter and the imagination becomes more active. For that reason, a witness, however honest, rarely persuades a judge that his present recollection is preferable to that which was taken down in writing immediately after the incident occurred. Therefore, contemporary documents are always of the utmost importance… " • "…I have found it essential in cases of fraud, when considering the credibility of witnesses, always to test their veracity by reference to the objective fact proved independently of their testimony, in particular by reference to the documents in the case, and also to pay particular regard to their motives and to the overall probabilities…" • Mostyn J said of the latter quotation, "these wise words are surely of general application and are not confined to fraud cases… it is certainly often difficult to tell whether a witness is telling the truth and I agree with the view of Bingham J that the demeanour of a witness is not a reliable pointer to his or her honesty." “iii) Carmarthenshire County Council : • The general rule is that oral evidence given under cross-examination is the gold standard because it reflects the long-established common law consensus that the best way of assessing the reliability of evidence is by confronting the witness. • However, oral evidence under cross-examination is far from the be all and end all of forensic proof. Referring to paragraph 22 of Gestmin , Mostyn J said: "… this approach applies equally to all fact-finding exercises, especially where the facts in issue are in the distant past. This approach does not dilute the importance that the law places on cross-examination as a vital component of due process, but it does place it in its correct context. “I have emphasised passages that have particular resonance in this case. “40. This is not all new thinking, as the dates of the cases cited in the footnote make clear. Armagas v Mundogas otherwise known as The Ocean Frost, has been routinely cited over the past 35 years. Lord Bingham's paper on "The Judge as Juror" (Chapter 1 of The Business of Judging ) is also familiar to many. Of the five methods of appraising a witness's evidence, he identified the primary method as analysing the consistency of the evidence with what is agreed or clearly shown by other evidence to have occurred. The witness's demeanour was listed last, and least of all.”
“This was a big matter so if there was something like that they would have mentioned it to me”
“Mr Deb also advised that the sellers would be leasing the property back and they would also be having an option for 5 years to purchase the property back at the same price he was buying in at”
“the Defendant said that he could secure a mortgage of 70% of the value of the Property, which at that time amounted to£205,000 ”
“yes, that is exactly what happened”
“Call in with regard to very good friends of his who are restaurant owners in Oxford. Apparently they seem to have got into trouble possibly with the Inland Revenue and also a company to whom they owe money and it seems there may be a Charging Order or something against their properties being a restaurant and a house in Oxford worth about£300k . … … What Raj [the Defendant] is thinking of doing is buying the property off them with the aid of a mortgage so they can pay off their creditors and then perhaps in due course he will be able to sell it back to them. They haven’t quite decided how to perms [sic] things as yet but he said he would get the gentleman Kawsar to ring AKJ later on in the day and then hopefully we could sort things out maybe we would need to make some Court Application or something like that because they may be getting near to being repossessed.”
“returning his earlier call … he said that … before he … went any further with it he had to sort out some sort of deal with Raj and speak to Raj further and he told Raj that once he had done so he would get back to us.”
“Following our previous meeting, you stated that you are a second time buyer looking to re-mortgage in order to capital raise for the purposes of a further property purchase for your Buy to Let portfolio”
“Inf’d me that his parents had agreed with Mr Deb that they can remain in the property for the foreseeable future”
“(i) Deciding whether an equity has been raised and, if so, how to satisfy it is a retrospective exercise looking backwards from the moment when the promise falls due to be performed and asking whether, in the circumstances which have actually happened, it would be unconscionable for a promise not to be kept either wholly or in part: Thorner v Major[2009] UKHL 18 ; [2009] 1 W.L.R. 776 at [57] and [101]. “ii) The ingredients necessary to raise an equity are (a) an assurance of sufficient clarity (b) reliance by the claimant on that assurance and (c) detriment to the claimant in consequence of his reasonable reliance: Thorner v Major at [29]. “iii) However, no claim based on proprietary estoppel can be divided into watertight compartments. The quality of the relevant assurances may influence the issue of reliance; reliance and detriment are often intertwined, and whether there is a distinct need for a “mutual understanding” may depend on how the other elements are formulated and understood: Gillett v Holt[2001] Ch. 210 at 225; Henry v Henry[2010] UKPC 3 ; [2010] 1 All E.R. 988 at [37]. “iv) Detriment need not consist of the expenditure of money or other quantifiable financial detriment, so long as it is something substantial. The requirement must be approached as part of a broad inquiry as to whether repudiation of an assurance is or is not unconscionable in all the circumstances: Gillett v Holt at 232; Henry v Henry at [38]. “v) There must be a sufficient causal link between the assurance relied on and the detriment asserted. The issue of detriment must be judged at the moment when the person who has given the assurance seeks to go back on it. The question is whether (and if so to what extent) it would be unjust or inequitable to allow the person who has given the assurance to go back on it. The essential test is that of unconscionability: Gillett v Holt at 232. “vi) Thus the essence of the doctrine of proprietary estoppel is to do what is necessary to avoid an unconscionable result: Jennings v Rice[2002] EWCA Civ 159 ; [2003] 1 P. & C.R. 8 at [56]. “vii) In deciding how to satisfy any equity the court must weigh the detriment suffered by the claimant in reliance on the defendant’s assurances against any countervailing benefits he enjoyed in consequence of that reliance: Henry v Henry at [51] and [53]. “viii) Proportionality lies at the heart of the doctrine of proprietary estoppel and permeates its every application: Henry v Henry at [65]. In particular there must be a proportionality between the remedy and the detriment which is its purpose to avoid: Jennings v Rice at [28] (citing from earlier cases) and [56]. This does not mean that the court should abandon expectations and seek only to compensate detrimental reliance, but if the expectation is disproportionate to the detriment, the court should satisfy the equity in a more limited way: Jennings v Rice at [50] and [51]. “ix) In deciding how to satisfy the equity the court has to exercise a broad judgmental discretion: Jennings v Rice at [51]. However the discretion is not unfettered. It must be exercised on a principled basis, and does not entail what HH Judge Weekes QC memorably called a “portable palm tree”: Taylor v Dickens [1998] 1 F.L.R. 806 (a decision criticised for other reasons in Gillett v Holt).”
“… A class of case in which the assurances and reliance had a consensual character not far short of contract. In such a case “both the claimant’s expectations and the element of detriment will be defined with reasonable clarity”
“… The claimant’s expectations are uncertain… Then their specific vindication cannot be the appropriate test. A similar problem arises if the court, although satisfied that the claimant has a genuine claim, is not satisfied that the high level of the claimant’s expectations is fairly derived from his deceased patron’s assurances, which may have justified only a lower level of expectation. In such cases the court may still take the claimant’s expectations (or the upper end of any range of expectations) as a starting point, but unless constrained by authority I would regard it as no more than a starting point.” “… The claimant’s expectations are uncertain… Then their specific vindication cannot be the appropriate test. A similar problem arises if the court, although satisfied that the claimant has a genuine claim, is not satisfied that the high level of the claimant’s expectations is fairly derived from his deceased patron’s assurances, which may have justified only a lower level of expectation. In such cases the court may still take the claimant’s expectations (or the upper end of any range of expectations) as a starting point, but unless constrained by authority I would regard it as no more than a starting point.”
“there might be a sliding scale by which the clearer the expectation, the greater the detriment and the longer the passage of time during which the expectation was reasonably held, the greater would be the weight that should be given to the expectation.”
“I would not regard this list of scaling factors as more than important examples of the considerations which come into play.”
“To recapitulate: there is a category of case in which the benefactor and the claimant have reached a mutual understanding which is in reasonably clear terms but does not amount to a contract. … In such case the court’s natural response is to fulfil the claimant’s expectations. But if the claimant’s expectations are uncertain, or extravagant, or out of all proportion to the detriment which the claimant has suffered, the court can and should recognise that the claimant’s equity should be satisfied in another (and generally more limited) way.”