“Mr and Mrs I did not intend or expect to receive a gain of that kind, and they were prepared (as part of a settlement in which they obtain payment and have no need to engage in further litigation) for that benefit, less their costs of these proceedings, to be returned to the "matrimonial pot" to be contested between Mr and Mrs P. They were also prepared to waive their right to 8% interest on the judgment. They made that position clear by way of an open offer contained in a letter from their solicitors dated18th October 2012 ”
“The relationship between cause of action estoppel and issue estoppel was described, in terms that have been generally accepted, by Diplock LJ in Thoday v Thoday[1964] P 181 , 197-198: "The particular type of estoppel relied upon by the husband is estoppel per rem judicatam. This is a generic term which in modern law includes two species. The first species, which I will call 'cause of action estoppel,' is that which prevents a party to an action from asserting or denying, as against the other party, the existence of a particular cause of action, the non-existence or existence of which has been determined by a court of competent jurisdiction in previous litigation between the same parties. If the cause of action was determined to exist, ie judgment was given upon it, it is said to be merged in the judgment, or, for those who prefer Latin, transit in rem judicatam. If it was determined not to exist, the unsuccessful plaintiff can no longer assert that it does; he is estopped per rem judicatam. This is simply an application of the rule of public policy expressed in the Latin maxim 'Nemo debet bis vexari pro una et eadem causa.' In this application of the maxim 'causa' bears its literal Latin meaning." Res judicata, or estoppel per rem judicatam, is thus a generic term of which cause of action estoppel and issue estoppel are two species. The distinction between the two species is of potential importance because the former creates an absolute bar, whereas the latter does not.”
“The true principle with a default judgment would seem to be that the defendant is estopped from setting up in a subsequent action a defence which was necessarily and with complete precision decided by the previous judgment; in other words, by the res judicata in the accurate sense.”
“A judicial determination directly involving an issue of fact or law disposes once and for all of the issue, so that it cannot afterwards be raised between the same parties or their privies. The estoppel covers only those matters which the prior judgment, decree or order necessarily established as the legal foundation or justification of its conclusion… In the phraseology of Lord Shaw “a fact fundamental to the decision arrived at” in the former proceedings and the legal quality of the fact must be taken as finally and conclusively established.”
“[the prior judgment relied upon] concludes not merely as to the point actually decided, but as to a matter which it was necessary to decide, and which was actually decided, as the groundwork of the decision itself, though not then the point in issue … [it is] conclusive evidence not merely of the fact directly decided, but of those facts which are… necessary steps to the decision…so cardinal to it that without them it cannot stand…”
“It may very well be, as has been convincingly argued …, that what is now taken to be the rule in Henderson v Henderson, has diverged from the ruling which Wigram V-C made, which was addressed to res judicata. But Henderson v Henderson abuse of process, as now understood, although separate and distinct from cause of action estoppel and issue estoppel, has much in common with them. The underlying public interest is the same: that there should be finality in litigation and that a party should not be twice vexed in the same matter. This public interest is reinforced by the current emphasis on efficiency and economy in the conduct of litigation, in the interests of the parties and the public as a whole. The bringing of a claim or the raising of a defence in later proceedings may, without more, amount to abuse if the court is satisfied (the onus being on the party alleging abuse) that the claim or defence should have been raised in the earlier proceedings if it was to be raised at all. I would not accept that it is necessary, before abuse may be found, to identify any additional element such as a collateral attack on a previous decision or some dishonesty, but where those elements are present the later proceedings will be much more obviously abusive, and there will rarely be a finding of abuse unless the later proceeding involves what the court regards as unjust harassment of a party. It is, however, wrong to hold that because a matter could have been raised in early proceedings it should have been, so as to render the raising of it in later proceedings necessarily abusive. That is to adopt too dogmatic an approach to what should in my opinion be a broad, merits-based judgment which takes account of the public and private interests involved and also takes account of all the facts of the case, focusing attention on the crucial question whether, in all the circumstances, a party is misusing or abusing the process of the court by seeking to raise before it the issue which could have been raised before. As one cannot comprehensively list all possible forms of abuse, so one cannot formulate any hard and fast rule to determine whether, on given facts, abuse is to be found or not. Thus while I would accept that lack of funds would not ordinarily excuse a failure to raise in earlier proceedings an issue which could and should have been raised then, I would not regard it as necessarily irrelevant, particularly if it appears that the lack of funds has been caused by the party against whom it is sought to claim. While the result may often be the same, it is in my view preferable to ask whether in all the circumstances a party's conduct is an abuse than to ask whether the conduct is an abuse and then, if it is, to ask whether the abuse is excused or justified by special circumstances. Properly applied, and whatever the legitimacy of its descent, the rule has in my view a valuable part to play in protecting the interests of justice.”
“In my view, what emerges from these authorities is that there is no inflexible rule to the effect that a withdrawal or judgment by consent invariably gives rise to a cause of action or issue estoppel. If it is clear that the party withdrawing is not intending to abandon the claim or issue that is being withdrawn, then he or she will not be barred from raising the point in subsequent proceedings unless it would be an abuse of process to permit that to occur. On the facts of the present case, it is clear that Ms Ako did not intend to abandon her claim. Nor would it be unjust or unfair as between the parties to permit her to start again: no abuse of process is involved here. ”
“It must, however, be borne in mind that res judicata, cause of action estoppel and issue estoppel are all creations of judge-made law, and that judges have been careful not to lay down absolute limits to the rule. Since the fundamental purpose of both cause of action estoppel and abuse of process are the same, it is no surprise that Dyson LJ preferred the more flexible principles of abuse of process to a supposedly rigid application of cause of action estoppel.”