“The Court of Appeal thought that the only way to give a remedy in such cases was by an extension of Lumley v Gye along the lines proposed by Lord Lindley [in Quinn v Leathem]. Today one can see that an alternative analysis was available: that the person who physically detained the contracting party would indeed incur liability, but not accessory liability under the principle in Lumley v Gye. It would be primary liability for intentionally causing loss by unlawfully interfering with the liberty of a third party, under the principle derived from Garret v Taylor … and Tarleton v M’Gawley …”
“For my part I do not accept that fraudulent misrepresentations used to a public official in the circumstances alleged in this case cease to be unlawful means for the purposes of the tort of unlawful interference with business because there is no identifiable financial loss caused in addition to the fact that a public official has been caused to do by the fraud what otherwise he would not have done, or not to do what otherwise he would have done.”
“It was also contended that the unlawful means used to the Secretary of State must be itself demonstrably actionable as a complete cause; and that in this case that is not pleaded as an alleged fact, because it is not said that there was any financial loss suffered by the Secretary of State.”
“Lord Hoffmann sees the rationale of the unlawful means tort as encapsulated in Lord Lindley’s reference (in Quinn v Leatham) to interference with “a person’s liberty or right to deal with others.””
“I do not, for my part, see Lord Hoffmann’s proposed test as a narrow or rigid one. On the contrary, that test (set out in para 51 of his opinion) of whether the defendant’s wrong interferes with the freedom of a third party to deal with the claimant, if taken out of context, might be regarded as so inflexible as to be of limited utility. But in practice it does not lack context. The authorities demonstrate its application in relation to a wide variety of economic relationships.”
“striking through a third party who might otherwise be doing business with your target, whether by buying his goods, hiring his barges or working with him or whatever. … The common law need do no more than draw the lines that it might be expected to draw: procuring an actionable wrong between the third party and the target or committing an actionable (in the sense explained by Lord Hoffmann …) wrong against the third party inhibiting his freedom to trade with the target.”
“There are, in my opinion, two grounds only upon which a person who procures the act of another can be made legally responsible for its consequences. In the first place, he will incur liability if he knowingly and for his own ends induces that other person to commit an actionable wrong. In the second place, when the act induced is within the right of the immediate actor, and is therefore not wrongful in so far as he is concerned, it may yet be to the detriment of a third party; and in that case, according to the law laid down by the majority in Lumley v. Gye, the inducer may be held liable if he can be shewn to have procured his object by the use of illegal means directed against that third party.”
“If the above reasoning is correct, Lumley v Gye was rightly decided, as I am of opinion it clearly was. Further, the principle involved in it cannot be confined to inducements to break contracts of service, nor indeed to inducements to break any contracts. The principle which underlies the decision reaches all wrongful acts done intentionally to damage a particular individual and actually damaging him.”
“He had the ordinary rights of a British subject. He was at liberty to earn his own living in his own way, provided he did not violate some special law prohibiting him from so doing, and provided he did not infringe the rights of other people. This liberty involved liberty to deal with other persons who were willing to deal with him. This liberty is a right recognised by law; its correlative is the general duty of every one not to prevent the free exercise of this liberty, except so far as his own liberty of action may justify him in so doing. But a person's liberty or right to deal with others is nugatory, unless they are at liberty to deal with him if they choose to do so. Any interference with their liberty to deal with him affects him. If such interference is justifiable in point of law, he has no redress. Again, if such interference is wrongful, the only person who can sue in respect of it is, as a rule, the person immediately affected by it; another who suffers by it has usually no redress; the damage to him is too remote, and it would be obviously practically impossible and highly inconvenient to give legal redress to all who suffered from such wrongs. But if the interference is wrongful and is intended to damage a third person, and he is damaged in fact - in other words, if he is wrongfully and intentionally struck at through others, and is thereby damnified - the whole aspect of the case is changed: the wrong done to others reaches him, his rights are infringed although indirectly, and damage to him is not remote or unforeseen, but is the direct consequence of what has been done. Our law, as I understand it, is not so defective as to refuse him a remedy by an action under such circumstances.”
“The remaining question is whether such conduct infringed the plaintiff's rights so as to give him a cause of action. In my opinion, it plainly did. The defendants were doing a great deal more than exercising their own rights: they were dictating to the plaintiff and his customers and servants what they were to do. The defendants were violating their duty to the plaintiff and his customers and servants, which was to leave them in the undisturbed enjoyment of their liberty of action as already explained. What is the legal justification or excuse for such conduct? None is alleged, and none can be found. This violation of duty by the defendants resulted in damage to the plaintiff - not remote, but immediate and intended. The intention to injure the plaintiff negatives all excuses and disposes of any question of remoteness of damage.” “The cardinal point of distinction between such cases and the present is that in them, although damage was intentionally inflicted on the plaintiffs, no one's right was infringed - no wrongful act was committed; whilst in the present case the coercion of the plaintiff's customers and servants, and of the plaintiff through them, was an infringement of their liberty as well as his, and was wrongful both to them and also to him …”
“117. It is often said that identifying the ratio decidendi of a case depends on ascertaining the material facts of the particular case. Earl of Halsbury LC uttered words of caution in Quinn v Leathem[1901] AC 495 , 506 which have been much quoted in this context, for example, in Cross & Harris, Precedent in English Law, 4th ed (1991), p 43: “Now, before discussing the case of Allen v Flood and what was decided therein, there are two observations of a general character which I wish to make, and one is to repeat what I have very often said before, that every judgment must be read as applicable to the particular facts proved, or assumed to be proved, since the generality of the expressions which may be found there are not intended to be expositions of the whole law, but governed and qualified by the particular facts of the case in which such expressions are to be found.” 118. A L Goodhart expounded the importance for these purposes of determining what were the material facts on which the judge based his conclusion in his essay, “Determining the Ratio Decidendi of a Case”, which can be found in his collection, Essays in Jurisprudence and the Common Law (1931). That essay gave rise to much debate among academic writers which is usefully discussed in Cross & Harris, Precedent in English Law, 4th ed, pp 63–71 and also in Duxbury, The Nature and Authority of Precedent (2008), pp 80–87. 119. One contribution to the debate which seems to me to be particularly valuable is A W B Simpson's essay, “The Ratio Decidendi of a Case and the Doctrine of Binding Precedent”, in Oxford Essays in Jurisprudence (first series), ed A G Guest (1961), p 148. Professor Simpson (as he later became) focused on the importance of limits on the powers of courts to establish a binding rule of law by virtue of the doctrine of precedent, and on the need, for that purpose, for a criterion of relevance. On this theme he said, at pp 165–166: “When the courts handle precedents they do not treat the formulations of law in earlier cases as exhaustive formulations but as formulations which were sufficiently exhaustive in the context in which they were made, and sufficiently precisely framed. It is not that a judge by convention should state a rule as narrowly as he can when he delivers judgment, but rather that he is not expected to state a rule with the completeness of a statutory draftsman, and thus it is always open to later courts to introduce exceptions which he did not mention—either because such exceptions did not occur to him, or because he deliberately abstained from stating an exception which, as matter of fact, he would have stated and acted upon if the facts of the case before him had been different from what they were.” 120. That seems to me to be a sound approach consistent with what courts have often said, for example, about not construing a previous judgment as if it were a statutory text, as well as with the emphasis given by (among other judges) the Earl of Halsbury LC to the relevance of the particular facts of a case.” “Now, before discussing the case of Allen v Flood and what was decided therein, there are two observations of a general character which I wish to make, and one is to repeat what I have very often said before, that every judgment must be read as applicable to the particular facts proved, or assumed to be proved, since the generality of the expressions which may be found there are not intended to be expositions of the whole law, but governed and qualified by the particular facts of the case in which such expressions are to be found.” “When the courts handle precedents they do not treat the formulations of law in earlier cases as exhaustive formulations but as formulations which were sufficiently exhaustive in the context in which they were made, and sufficiently precisely framed. It is not that a judge by convention should state a rule as narrowly as he can when he delivers judgment, but rather that he is not expected to state a rule with the completeness of a statutory draftsman, and thus it is always open to later courts to introduce exceptions which he did not mention—either because such exceptions did not occur to him, or because he deliberately abstained from stating an exception which, as matter of fact, he would have stated and acted upon if the facts of the case before him had been different from what they were.”
“139. Counsel’s submissions were wide-ranging. In particular the House is called upon to consider the ingredients of the tort of interference with a business by unlawful means and the tort of inducing breach of contract. These are much vexed subjects. Nearly 350 reported decisions and academic writings were placed before the House. There are many areas of uncertainty. Judicial observations are not always consistent, and academic consensus is noticeably absent. In the words of one commentator, the law is in a “terrible mess”
“This whole area of economic tort has been plagued by uncertainty for far too long. Your Lordships now have the opportunity to give it a coherent shape. This surely is an opportunity to be taken.”