OBG Limited and others (Appellants) v. Allan and others (Respondents) Douglas and another and others (Appellants) v. Hello! Limited and others (Respondents) Mainstream Properties Limited (Appellants) v. Young and others and another (Respondents), (2007)


HOUSE OF LORDSSESSION 2006-07 [2007] UKHL 21 on appeal from:[2005] EWCA Civ 106 [2005] EWCA Civ 595, [2005] EWCA Civ 861 OPINIONS OF THE LORDS OF APPEAL FOR JUDGMENT IN THE CAUSE OBG Limited and others (Appellants) v. Allan and others (Respondents) Douglas and another and others (Appellants) v. Hello! Limited and others (Respondents) Mainstream Properties Limited (Appellants) v. Young and others and another (Respondents)Appellate Committee Lord Hoffmann Lord Nicholls of Birkenhead Lord Walker of Gestingthorpe Baroness Hale of Richmond Lord Brown of Eaton-under-HeywoodCounselAppellants: OBG Ltd and others v. Allan and others John Randall QC Alistair Wyvill Marc Brown (Instructed by Hammonds) Douglas and another and others v. Hello! Ltd Richard Millett QC Richard Slowe Paul Stanley (Instructed by S J Berwin LLP) Mainstream Properties Ltd v Young and others and another John Randall QC John de Waal (Instructed by The Smith Partnership)Respondents: OBG v. Allan Gregory Mitchell QC Paul Greenwood (Instructed by Reynolds Porter Chamberlain LLP) Douglas and another and others v. Hello! Ltd James Price QC Giles Fernando (Instructed by M Law) Mainstream Properties Ltd v. Young and others and another Gordon Pollock QC Barry Isaacs (Instructed by Leigh Davis) Hearing dates: 13, 14, 15, 16, 20, 21, 22, 23, 27 and 28 November 2006ON WEDNESDAY 2 MAY 2007HOUSE OF LORDSOPINIONS OF THE LORDS OF APPEAL FOR JUDGMENTIN THE CAUSEOBG Limited and others (Appellants) v. Allan and others (Respondents)Douglas and another and others (Appellants) v. Hello! Limited and others (Respondents)Mainstream Properties Limited (Appellants) v. Young and others and another (Respondents)[2007] UKHL 21LORD HOFFMANNMy Lords,The three appeals1.  These three appeals are principally concerned with claims in tort for economic loss caused by intentional acts(a)  In OBG Ltd v Allan [2005] QB 762 the defendants were receivers purportedly appointed under a floating charge which is admitted to have been invalid. Acting in good faith, they took control of the claimant company's assets and undertaking. The claimant says that this was not only a trespass to its land and a conversion of its chattels but also the tort of unlawful interference with its contractual relations. It claims that the defendants are liable in damages for the value of the assets and undertaking, including the value of the contractual claims, as at the date of their appointment. Alternatively, it says the defendants are liable for the same damages in conversion. (b)  In Douglas v Hello! Ltd the magazine OK! [2006] QB 125 contracted for the exclusive right to publish photographs of a celebrity wedding at which all other photography would be forbidden. The rival magazine Hello! published photographs which it knew to have been surreptitiously taken by an unauthorised photographer pretending to be a waiter or guest. OK! says that this was interference by unlawful means with its contractual or business relations or a breach of its equitable right to confidentiality in photographic images of the wedding. (c)  In Mainstream Properties Ltd v Young [2005] IRLR 964 two employees of a property company, in breach of their contracts, diverted a development opportunity to a joint venture in which they were interested. The defendant, knowing of their duties but wrongly thinking that they would not be in breach, facilitated the acquisition by providing finance. The company says that he is liable for the tort of wrongfully inducing breach of contract.2.  It will therefore be seen that the claimants in these three appeals rely upon at least five different wrongs, or alleged wrongs, which they say provide them with causes of action for economic loss: inducing breach of contract (Mainstream), causing loss by unlawful means (Hello!) interference with contractual relations (OBG); breach of confidence (Hello!) and conversion (OBG). I shall put aside the last two until I come to deal with the facts of the cases in which they arise. But I propose to start with some general observations on the first three torts.Inducing breach of contract3.  Liability for inducing breach of contract was established by the famous case of Lumley v Gye (1853) 2 E & B 216. The court based its decision on the general principle that a person who procures another to commit a wrong incurs liability as an accessory. As Erle J put it (at p 232): "It is clear that the procurement of the violation of a right is a cause of action in all instances where the violation is an actionable wrong, as in violations of a right to property, whether real or personal, or to personal security: he who procures the wrong is a joint wrongdoer, and may be sued, either alone or jointly with the agent, in the appropriate action for the wrong complained of."4.  For a court in 1853, the difficulty about applying this principle to procuring a breach of contract was that the appropriate action for the wrong committed by the contracting party lay in contract but no such action would lie against the procurer. Only a party to the contract could be sued for breach of contract. The answer, said the court, was to allow the procurer to be sued in tort, by an action on the case. There was a precedent for this mixing and matching of the forms of action in the old action on the case for enticing away someone else's servant: see Gareth Jones "Per Quod Servitium Amisit" (1958) 74 LQR 39. Some lawyers regarded that action as a quaint anomaly, but the court in Lumley v Gye treated it as a remedy of general application.5.  The forms of action no longer trouble us. But the important point to bear in mind about Lumley v Gye is that the person procuring the breach of contract was held liable as accessory to the liability of the contracting party. Liability depended upon the contracting party having committed an actionable wrong. Wightman J made this clear when he said (at p 238):"It was undoubtedly prima facie an unlawful act on the part of Miss Wagner to break her contract, and therefore a tortious act of the defendant maliciously to procure her to do so…"Causing loss by unlawful means6.  The tort of causing loss by unlawful means has a different history. It starts with cases like Garret v Taylor (1620) Cro Jac 567, in which the defendant was held liable because he drove away customers of Headington Quarry by threatening them with mayhem and vexatious suits. Likewise, in Tarleton v M'Gawley (1790) 1 Peake NPC 270 Lord Kenyon held the master of the Othello, anchored off the coast of West Africa, liable in tort for depriving a rival British ship of trade by the expedient of using his cannon to drive away a canoe which was approaching from the shore. In such cases, there is no other wrong for which the defendant is liable as accessory. Although the immediate cause of the loss is the decision of the potential customer or trader to submit to the threat and not buy stones or sell palm oil, he thereby commits no wrong. The defendant's liability is primary, for intentionally causing the plaintiff loss by unlawfully interfering with the liberty of others.7.  These old cases were examined at some length by the House of Lords in Allen v Flood [1898] AC 1 and their general principle approved. Because they all involved the use of unlawful threats to intimidate potential customers, Salmond 1st ed (1907) classified them under the heading of "Intimidation" and the existence of a tort of this name was confirmed by the House of Lords in Rookes v Barnard [1964] AC 1129. But an interference with the liberty of others by unlawful means does not require threats. If, for example, the master of the Othello in Tarleton v M'Gawley had deprived the plaintiff of trade by simply sinking the approaching vessel with its cargo of palm oil, it is unlikely that Lord Kenyon would have regarded this as making any difference. Salmond's tort of intimidation is therefore only one variant of a broader tort, usually called for short "causing loss by unlawful means", which was recognised by Lord Reid in J T Stratford & Son Ltd v Lindley [1965] AC 269, 324:"the respondent's action [in calling a strike] made it practically impossible for the appellants to do any new business with the barge hirers. It was not disputed that such interference with business is tortious if any unlawful means are employed."8.  The tort of causing loss by unlawful means differs from the Lumley v Gye principle, as originally formulated, in at least four respects. First, unlawful means is a tort of primary liability, not requiring a wrongful act by anyone else, while Lumley v Gye created accessory liability, dependent upon the primary wrongful act of the contracting party. Secondly, unlawful means requires the use of means which are unlawful under some other rule ("independently unlawful") whereas liability under Lumley v Gye 2 E & B 216 requires only the degree of participation in the breach of contract which satisfies the general requirements of accessory liability for the wrongful act of another person: for the relevant principles see CBS Songs Ltd v Amstrad Consumer Electronics plc [1988] AC 1013 and Unilever v Chefaro [1994] FSR 135. Thirdly, liability for unlawful means does not depend upon the existence of contractual relations. It is sufficient that the intended consequence of the wrongful act is damage in any form; for example, to the claimant's economic expectations. If the African canoeists had been delivering palm oil under a concluded contract of which notice had been given to the master of the Othello, Lord Kenyon would no doubt have considered that an a fortiori reason for granting relief but not as making a difference of principle. Under Lumley v Gye, on the other hand, the breach of contract is of the essence. If there is no primary liability, there can be no accessory liability. Fourthly, although both are described as torts of intention (the pleader in Lumley v Gye used the word 'maliciously', but the court construed this as meaning only that the defendant intended to procure a breach of contract), the results which the defendant must have intended are different. In unlawful means the defendant must have intended to cause damage to the claimant (although usually this will be, as in Tarleton v M'Gawley 1 Peake NPC 270, a means of enhancing his own economic position). Because damage to economic expectations is sufficient to found a claim, there need not have been any intention to cause a breach of contract or interfere with contractual rights. Under Lumley v Gye, on the other hand, an intention to cause a breach of contract is both necessary and sufficient. Necessary, because this is essential for liability as accessory to the breach. Sufficient, because the fact that the defendant did not intend to cause damage, or even thought that the breach of contract would make the claimant better off, is irrelevant. In South Wales Miners' Federation v Glamorgan Coal Co Ltd [1905] AC 239 the miners' union said that their intention in calling a strike (inducing miners to break their contracts of employment) was, OPEC-like, to restrict production of coal and thereby raise its price. So far from wishing to cause the mine owners loss, they intended to make both owners and miners better off. The House of Lords said that this made no difference. It was sufficient that the union intended the employment contracts to be broken. It was no defence, as Lord Macnaghten put it (at p 246), that "if the masters had only known their own interest they would have welcomed the interference of the federation".Allen v Flood: the torts kept separate9.  The Law Lords who formed the majority in Allen v Flood [1898] AC 1 showed a clear recognition that Lumley v Gye 2 E & B 216 and causing loss by unlawful means are separate torts, each with its own conditions for liability. The difficulty for the plaintiffs in Allen v Flood was that, although the jury found that the defendants had acted "maliciously" in procuring the shipyard not to employ them, the defendants had neither used unlawful means nor procured any breach of contract. In the Court of Appeal the plaintiffs had argued successfully that the essence of Lumley v Gye was that the defendant had acted maliciously. A breach of contract was not essential. But the majority in the House of Lords said that liability had been as accessory to the breach of contract. Lord Watson quoted from the judgments in the Court of Queen's Bench and said (at p 106) that they embodied "an intelligible and a salutary principle":"He who wilfully induces another to do an unlawful act which, but for his persuasion, would or might never have been committed, is rightly held to be responsible for the wrong he has procured." (p 107)10.  Likewise Lord Herschell said (at p 123) that he was satisfied that —"the procuring [of] what was described as an unlawful act - namely, a breach of contract, was regarded as the gist of the action."11.  Lord Macnaghten reserved his opinion on whether Lumley v Gye had been rightly decided but there can be no doubt about what principle he thought it laid down (see pp 151-152):"[W]here the act itself to which the loss is traceable involves some breach of contract or some breach of duty, and amounts to an interference with legal rights…the immediate agent is liable, and it may well be that the person in the background who pulls the strings is liable too, though it is not necessary in the present case to express any opinion on that point."12.  When the case was argued before the House of Lords (see Lord Herschell at p. 132), the weight of the plaintiffs' argument was shifted to the Garret v Taylor Cro Jac 567 and Tarleton v M'Gawley 1 Peake NPC 270 line of authority, which were said to support the proposition that any unjustified interference with trade or employment was actionable. But the majority said that it was essential to liability in those cases that the defendant had injured the plaintiff by using unlawful means against a third party. Lord Watson (at p. 104) described them as "cases in which an act detrimental to others, but affording no remedy against the immediate actor, had been procured by illegal means." Lord Herschell said (at p 137):"In all of them the act complained of was in its nature wrongful; violence, menaces of violence, false statements."13.  Thus the facts of Allen v Flood did not fall within Lumley v Gye because no breach of contract or other unlawful act had been procured and did not fall within the unlawful means tort because no unlawful means had been used. The majority did not accept that there was any other basis for liability. In particular, the fact that the defendant deliberately caused damage "maliciously" in the sense of having a bad or improper motive was rejected as a ground for imposing liability. As Lord Watson (whose, views, said Lord Macnaghten in Quinn v Leathem [1901] AC 495, 509 "represent the views of the majority better far than any other single judgment delivered in the case") summed up at p 96:"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."(Like Lord Macnaghten in Quinn v Leathem (at p 510), I think that the reference to Lumley v Gye in support of the second cause of action is a slip - "a rare occurrence in a judgment of Lord Watson's" - because it obviously applies to the first cause of action).14.  Some writers regret the failure of English law to accept bad motive as a ground for liability, as it is in the United States and Germany: see for example Dyson Heydon, Economic Torts 2nd ed (1978) p 28. But I agree with Tony Weir's opinion, forcibly expressed in his Clarendon Law Lectures on Economic Torts (OUP 1997) that we are better off without it. It seems to have created a good deal of uncertainty in the countries which have adopted such a principle. Furthermore, the rarity of actions for conspiracy (in which a bad motive can, exceptionally, found liability) suggests that it would not have made much practical difference.Quinn v Leathem: the seeds of confusion15.  Quinn v Leathem [1901] AC 495 is nowadays regarded as a case on lawful means conspiracy, which established that an improper motive can anomalously found a cause of action which, under the principle in Allen v Flood, would not lie against an individual. But this was by no means clear at the time and the case contains some discussion of both Lumley v Gye and causing loss by unlawful means. Lord Macnaghten, in a well-known passage (at p. 510), considered the basis of Lumley v Gye:"I have no hesitation in saying that I think the decision was right, not on the ground of malicious intention - that was not, I think, the gist of the action - but on the ground that a violation of a legal right committed knowingly is a cause of action, and that it is a violation of legal right to interfere with contractual relations recognised by law if there be no sufficient justification for the interference."16.  I rather doubt whether Lord Macnaghten's view of what Lumley v Gye decided had altered since his opinion in Allen v Flood three years earlier. But the Quinn v Leathem formulation is open to the construction that there can be liability for "interfering" with contractual relations without being accessory to any breach of contract. Of course if this is done by unlawful means with the intention of causing damage, it will fall within the unlawful means tort. But Lord Macnaghten made no mention of unlawful means and in any case, under that tort, interference with contractual relations is not a necessary part of the cause of action. Any intentionally inflicted damage will do. The dictum was therefore capable of giving rise to confusion.17.  Lord Lindley went even further and said, at p 535, that the Lumley v Gye tort was an example of causing loss by unlawful means:"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, or 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."18.  There are two objections to this analysis. First, it reflects neither the reasoning of the court in Lumley v Gye nor the analysis of the case in Allen v Flood. Secondly, to say that the defendant in Lumley v Gye did a wrongful act is circular. It was only wrongful because the court in Lumley v Gye said that inducing a breach of contract was tortious. It is circular then to say that it was tortious because it involved a wrongful act.19.  One reason, I think, why it seemed to Lord Lindley and others that Lumley v Gye and the unlawful means tort were illustrations of the same principle was that quite often, particularly in cases of torts committed in the course of commercial competition or industrial disputes, both could be regarded as unlawful ways of carrying on the competition or the dispute. That was how it appeared to Bowen LJ in Mogul Steamship Co Ltd v McGregor, Gow & Co (1889) 23 QBD 598, 614:"No man, whether trader or not, can, however, justify damaging another in his commercial business by fraud or misrepresentation. Intimidation, obstruction, and molestation are forbidden; so is the intentional procurement of a violation of individual rights, contractual or other, assuming always that there is no just cause for it. The intentional driving away of customers by shew of violence: Tarleton v. M'Gawley 1 Peake NPC 270; the obstruction of actors on the stage by preconcerted hissing: Clifford v. Brandon 2 Camp 358; Gregory v. Brunswick 6 Man & G 205; the disturbance of wild fowl in decoys by the firing of guns: Carrington v. Taylor 1 East 571, and Keeble v. Hickeringill 11 East 574n; the impeding or threatening servants or workmen: Garret v. Taylor Cro Jac 567; the inducing persons under personal contracts to break their contracts: Bowen v. Hall 6 QBD 333; Lumley v. Gye 2 E & B 216; all are instances of such forbidden acts."20.  These are, it is true, all instances of unlawful ways of causing economic damage. But that does not mean (and I do not think that Bowen LJ meant) that there is a single principle which makes them all unlawful. Disturbing the wild fowl may have been unlawful because it constituted a nuisance (compare Hollywood Silver Fox Farm Ltd v Emmett [1936] 2 KB 468); the people who hissed in the theatre may have been liable for malicious Quinn v Leathem conspiracy; Lumley v Gye was accessory liability and Tarleton v. M'Gawley was true primary unlawful means liability.21.  Furthermore, there is no reason why the same facts should not give rise to both accessory liability under Lumley v Gye and primary liability for using unlawful means. If A, intending to cause loss to B, threatens C with assault unless he breaks his contract with B, he is liable as accessory to C's breach of contract under Lumley v Gye and he commits the tort of causing loss to B by unlawful means. The areas of liability under the two torts may be intersecting circles which cover common ground. This often happened in 20th century industrial disputes, where, for example, a union would use unlawful means (inducing members to break their contracts of employment) to put pressure upon the employer to break his contract with someone else who was the union's real target. Leaving aside statutory defences, this would make the union liable both under Lumley v Gye as accessory to the employer's breach of contract and for causing loss to the target by unlawful means. That does not make Lumley v Gye and unlawful means the same tort. But the close proximity of the circumstances in which they could be committed, particularly in industrial disputes, may explain why they were often thought to be manifestations of the same principle.Muddle: GWK Ltd v Dunlop Rubber Co Ltd22.  Muddle set in with the influential case of GWK Ltd v Dunlop Rubber Co Ltd (1926) 42 TLR 376. The GWK company made motor cars and the ARM company made tyres. GWK contracted to fit all their new cars with ARM tyres and to show them with ARM tyres at trade exhibitions. On the night before a motor show in Glasgow, Dunlop employees removed the ARM tyres from two GWK cars on the exhibition and substituted Dunlop tyres. The evidence showed that Dunlop knew of ARM's contractual right to have their tyres displayed.23.  Lord Hewart CJ held Dunlop liable. He referred to the dicta of Lords Macnaghten and Lindley in Quinn v Leathem [1901] AC 495, which I have already cited, and said, at p 377:"In [my] opinion the defendants…knowingly committed a violation of the ARM company's legal rights by interfering, without any justification whatever, with the contractual relations existing between them and the GWK company and [I think] that the defendants so interfered with the intention of damaging the ARM company and that the company [has] been thereby damnified."24.  The case is a good example of intentionally causing loss by unlawful means. There was a finding of an intention to damage the ARM company (as a means of advancing the interests of the Dunlop company, but more of that later) and although there is no express reference to unlawful means in the passage I have cited, it is implied both by the reference to Lord Lindley's statement of principle and the separate finding of trespass to the goods of the GWK company.25.  Lord Hewart, however, made no reference to the tort of causing loss by unlawful means, possibly because the only form in which it was then recognised in the text books was Salmond's tort of intimidation. GWK Ltd v Dunlop Rubber Co Ltd was clearly not a case of intimidation. Dunlop had not threatened anyone but had achieved its ends more directly by a trespass against the property of the GWK company. It had nevertheless interfered with the freedom of the ARM company to fit its vehicles with tyres in accordance with its agreement with GWK. Nowadays we would not regard the fact that this was achieved by direct action rather than threats as making any difference: in both cases, intended loss is caused by unlawful means used against a third party. But Lord Hewart looked for a different pigeon hole and the way he formulated his reasons ("committed a violation of the ARM company's legal rights by interfering…with the contractual relations existing between them and the GWK company") shows that he found it in Lord Lindley's extended definition of the Lumley v Gye tort. As Sir Jeremy Lever QC pointed out in an elegant essay written nearly 50 years ago, before Rookes v. Barnard and Stratford v. Lindley, this analysis is unsatisfactory because it "ignores the importance of the means employed and over-emphasises the interest of the victim which is affected": see Means, Motives and Interests in the Law of Torts, in Oxford Essays in Jurisprudence (ed Guest (1961) at p 53).Adoption of the unified theory: DC Thomson & Co Ltd v Deakin26.  The law was analysed in great depth by the Court of Appeal in DC Thomson & Co Ltd v Deakin [1952] Ch 646, in which argument by eminent counsel extended over nine days. The judgment of Jenkins LJ in particular has directed the course of the law ever since. He fully adopted the theory, originating with Lord Lindley in Quinn v Leathem and supported (possibly unintentionally) by Lord Macnaghten's dictum in the same case, that the principle of Lumley v Gye extended to all interference with contractual relations by unlawful means. "Direct persuasion or procurement or inducement applied by the third party to the contract breaker" was "regarded as a wrongful act in itself" and constituted the "primary form" of the tort: see p 694. But other forms of interference with contracts by unlawful means, such as GWK Ltd v Dunlop Rubber Co Ltd (1926) 42 TLR 376 ("a striking example") came within the same tort. From the dicta of Lord Macnaghten and Lord Lindley in Quinn v Leathem Jenkins LJ (at p 693) deduced two propositions:"First…there may…be an actionable interference with contractual rights where other means of interference than persuasion or procurement or inducement, in the sense of influence of one kind or another brought to bear on the mind of the contract breaker to cause him to break his contract, are used by the interferer; but, secondly, that (apart from conspiracy to injure, which, as I have said, is not in question so far as this motion is concerned) acts of a third party lawful in themselves do not constitute an actionable interference with contractual rights merely because they bring about a breach of contract, even if they were done with the object and intention of bringing about such breach."27.  The unified theory thus treated procuring breach of contract, the old Lumley v Gye tort, as one species of a more general tort of actionable interference with contractual rights.28.  My Lords, I think that one reason why the Court of Appeal in DC Thomson & Co Ltd v Deakin [1952] Ch 646 adopted the unified theory was that there was an inadequate appreciation at that time of the scope, possibly even the existence, of the tort of causing loss by unlawful means. The reasoning of the Court of Appeal proceeded on the footing that no such tort existed. On that assumption, there was clearly a compelling case for creating a cause of action to cover cases in which the defendant used unlawful means to cause damage by interfering with the performance of a contract without any voluntary or even compelled participation on the part of the contracting party. As Evershed MR put it (at pp 677-678):"It was suggested in the course of argument by Sir Frank Soskice and by Mr. Lindner, that the tort must still be properly confined to such direct intervention, that is, to cases where the intervener or persuader uses by personal intervention persuasion on the mind of one of the parties to the contract so as to procure that party to break it. I am unable to agree that any such limitation is logical, rational or part of our law. In such cases where the intervener (if I may call him such) does so directly act upon the mind of a party to the contract as to cause him to break it, the result is, for practical purposes, as though in substance he, the intervener, is breaking the contract, although he in not a party to it…At any rate, it is clear that, when there is such a direct intervention by the intervener, the intervention itself is thereby considered wrongful. I cannot think that the result is any different if the intervener, instead of so acting upon the mind of the contracting party himself, by some other act, tortious in itself, prevents the contracting party from performing the bargain. A simple case is where the intervener, for example, physically detains the contracting party so that the contracting party is rendered unable by the detention to perform the contract."29.  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. 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.30.  My Lords, I do not wish to exaggerate the difficulties which have arisen from the adoption of the unified theory. To some extent it is a matter of nomenclature. If, as Jenkins LJ made clear, liability outside the primary form of the tort requires the use of unlawful means, does it matter whether the tort is classified as causing loss by unlawful means or an extension of Lumley v Gye? In most cases, the question of taxonomy will make no difference. It is not easy to point to cases which were wrongly decided because the court had adopted the unified theory rather than the two-tort analysis of Allen v Flood.31.  Is there something to be said in principle for a unified theory? Tony Weir, in the Clarendon Law Lectures to which I have referred, makes a bravura case for one. Not, it is true, the version adopted in DC Thomson v Deakin, which he thinks paid too much attention to the contractual nature of the claimant's rights. Weir would prefer Lumley v Gye to be swallowed up by the tort of intentionally causing loss by unlawful means, treating the "seduction" of the contracting party as a species of unlawful means and not distinguishing between interference with contractual rights and damage to economic expectations. The example of what Lord Atkin achieved for negligence in Donogue v Stevenson [1932] AC 562 always beckons (see Weir at p. 25). But this too is a form of seduction which may lure writers onto the rocks. 32.  In my opinion the principle of accessory liability for breach of contract, the first of Lord Watson's principles of liability for the act of another in Allen v Flood, cannot be subsumed in the tort of causing loss by unlawful means (the second of Lord Watson's principles in Allen v Flood) simply by classifying "seduction" as unlawful means. That only adds a pejorative description to a circular argument: see paragraph 18 above. To induce a breach of contract is unlawful means when the breach is used to cause loss to a third party, as in Stratford v Lindley [1965] AC 269, but it makes no sense to say that the breach of contract itself has been caused by unlawful means. Philip Sales and Daniel Stilitz, in their illuminating article "Intentional Infliction of Harm by Unlawful Means" (1999) 115 LQR 411-437, make it clear at p. 433 that Lumley v Gye was "founded on a different principle of liability than the intentional harm tort". It treats contractual rights as a species of property which deserve special protection, not only by giving a right of action against the party who breaks his contract but by imposing secondary liability on a person who procures him to do so. In this respect it is quite distinct from the unlawful means principle, which is concerned only with intention and wrongfulness and is indifferent as to the nature of the interest which is damaged. I therefore do not think that the two causes of action can be brought within a unified theory and agree with Professor Peter Cane (Mens Rea in Tort Law (2000) 20 Oxford JLS 533, 552, that —"The search for 'general principles of liability' based on types of conduct is at best a waste of time and at worst a potential source of serious confusion; and the broader the principle, the more is this so. Tort law is a complex interaction between protected interests, sanctioned conduct, and sanctions; and although there are what might be called 'principles of tort liability', by and large, they are not very 'general'. More importantly, they cannot be stated solely in terms of the sorts of conduct which will attract tort liability. Each principle must refer, as well, to some interest protected by tort law and some sanction provided by tort law."33.  That said, I would not expect your Lordships to reject the unified theory adopted in DC Thomson & Co Ltd v Deakin [1952] Ch 646 unless it had serious practical disadvantages. After all, in Merkur Island Shipping Corpn v Laughton [1983] 2 AC 570, 607, Lord Diplock said that for 30 years the judgment of Jenkins LJ had been regarded as authoritative and that no benefit was gained by "raking over once again the previous decisions", as I must confess to have done. But I do think that it has been a source of confusion in more than one respect and that it would therefore be better to abandon it and return to the two torts identified by Lord Watson in Allen v Flood [1898] AC 1. To these problems created by the unified theory I now turn.Direct and indirect interference34.  The distinction between the original Lumley v Gye tort and its extension in DC Thomson & Co Ltd v Deakin has been described in later cases as a distinction between "direct" and "indirect" interference. The latter species requires the use of independently unlawful means while the former requires no more than inducement or persuasion. But the use of these terms seems to me to distract attention from the true questions which have to be asked in each case. For example, in Daily Mirror Newspapers Ltd v Gardner [1968] 2 QB 762 the Federation of Retail Newsagents resolved to boycott the Daily Mirror for a week to put pressure on the publishers to allow its members higher margins. The Federation advised their members to stop buying the paper from wholesalers. The publishers claimed an injunction on the ground that the Federation was procuring a breach of the wholesalers' running contracts with the publishers to take a given number of copies each day. Counsel for the Federation (see the judgment of Lord Denning MR at p 781) said that it was a case of indirect inducement because the Federation "did not exert directly any pressure or inducement on the wholesalers: but at most they only did it indirectly by recommending the retailers to give stop orders." Lord Denning said that it did not matter whether one procured a breach of contract "by direct approach to the one who breaks his contract or by indirect influence through others". There seems to me much sense in this observation, although whether it leads to the conclusion that the defendant should be liable in both cases or neither is another matter.35.  In Torquay Hotel Co Ltd v Cousins [1969] 2 Ch 106, 138-139, Lord Denning changed his mind. He said that there was a distinction between "direct persuasion", which was "unlawful in itself", and bringing about a breach by indirect methods, which had to involve independently unlawful means. On reconsideration of the Daily Mirror case he thought the Federation had "interfered directly by getting the retailers as their agents to approach the wholesalers."36.  This treats the distinction as turning simply upon whether there was communication, directly or through an agent, between the defendant and the contract-breaker. But, like Lord Denning in the Daily Mirror case, I cannot see why this should make a difference. If that is what the distinction between "direct" and "indirect" means, it conceals the real question which has to be asked in relation to Lumley v Gye: did the defendant's acts of encouragement, threat, persuasion and so forth have a sufficient causal connection with the breach by the contracting party to attract accessory liability? The court in Lumley v Gye made it clear that the principle upon which a person is liable for the act of another in breaking his contract is the same as that on which he is liable for the act of another in committing a tort. It follows, as I have said, that the relevant principles are to be found in cases such as CBS Songs Ltd v Amstrad Consumer Electronics plc [1988] AC 1013 and Unilever v Chefaro [1994] FSR 135. By the test laid down in these cases, the Federation could not have incurred any liability. They were not encouraging or assisting the wholesalers in breaking their contracts. They were simply advising their members to exercise their own freedom to buy whatever newspapers they liked. The wholesalers had no right to the co-operation of the retailers in enabling them to perform their contracts. Liability could not depend upon the accident of whether the Federation had communicated (directly or through an intermediary) with the wholesalers. The distinction between direct and indirect interference was therefore irrelevant and misleading.37.  The distinction between direct and indirect interference has the further disadvantage that it suggests that the "primary form" of the Lumley v Gye tort and the extension of the tort are mutually exclusive. Interference cannot be both direct and indirect. But, as I have said earlier, there is no reason why the same act should not create both accessory liability for procuring a breach of contract and primary liability for causing loss by unlawful means.38.  In my opinion, therefore, the distinction between direct and indirect interference is unsatisfactory and it is time for the unnatural union between the Lumley v Gye tort and the tort of causing loss by unlawful means to be dissolved. They should be restored to the independence which they enjoyed at the time of Allen v Flood. I shall therefore proceed to discuss separately the essential elements of each.Inducing breach of contract: elements of the Lumley v Gye tort.39.  To be liable for inducing breach of contract, you must know that you are inducing a breach of contract. It is not enough that you know that you are procuring an act which, as a matter of law or construction of the contract, is a breach. You must actually realize that it will have this effect. Nor does it matter that you ought reasonably to have done so. This proposition is most strikingly illustrated by the decision of this House in British Industrial Plastics Ltd v Ferguson [1940] 1 All ER 479, in which the plaintiff's former employee offered the defendant information about one of the plaintiff's secret processes which he, as an employee, had invented. The defendant knew that the employee had a contractual obligation not to reveal trade secrets but held the eccentric opinion that if the process was patentable, it would be the exclusive property of the employee. He took the information in the honest belief that the employee would not be in breach of contract. In the Court of Appeal McKinnon LJ observed tartly ([1938] 4 All ER 504, 513) that in accepting this evidence the judge had "vindicated [his] honesty…at the expense of his intelligence" but he and the House of Lords agreed that he could not be held liable for inducing a breach of contract.40.  The question of what counts as knowledge for the purposes of liability for inducing a breach of contract has also been the subject of a consistent line of decisions. In Emerald Construction Co Ltd v Lowthian [1966] 1 WLR 691, union officials threatened a building contractor with a strike unless he terminated a sub-contract for the supply of labour. The defendants obviously knew that there was a contract - they wanted it terminated - but the court found that they did not know its terms and, in particular, how soon it could be terminated. Lord Denning MR said (at pp; 700-701)"Even if they did not know the actual terms of the contract, but had the means of knowledge - which they deliberately disregarded - that would be enough. Like the man who turns a blind eye. So here, if the officers deliberately sought to get this contract terminated, heedless of its terms, regardless whether it was terminated by breach or not, they would do wrong. For it is unlawful for a third person to procure a breach of contract knowingly, or recklessly, indifferent whether it is a breach or not."41.  This statement of the law has since been followed in many cases and, so far as I am aware, has not given rise to any difficulty. It is in accordance with the general principle of law that a conscious decision not to inquire into the existence of a fact is in many cases treated as equivalent to knowledge of that fact (see Manifest Shipping Co Ltd v Uni-Polaris Insurance Co Ltd [2003] 1 AC 469). It is not the same as negligence or even gross negligence: in British Industrial Plastics Ltd v Ferguson [1940] 1 All ER 479, for example, Mr Ferguson did not deliberately abstain from inquiry into whether disclosure of the secret process would be a breach of contract. He negligently made the wrong inquiry, but that is an altogether different state of mind.42.  The next question is what counts as an intention to procure a breach of contract. It is necessary for this purpose to distinguish between ends, means and consequences. If someone knowingly causes a breach of contract, it does not normally matter that it is the means by which he intends to achieve some further end or even that he would rather have been able to achieve that end without causing a breach. Mr Gye would very likely have preferred to be able to obtain Miss Wagner's services without her having to break her contract. But that did not matter. Again, people seldom knowingly cause loss by unlawful means out of simple disinterested malice. It is usually to achieve the further end of securing an economic advantage to themselves. As I said earlier, the Dunlop employees who took off the tyres in GWK Ltd v Dunlop Rubber Co Ltd (1926) 42 TLR 376 intended to advance the interests of the Dunlop company.43.  On the other hand, if the breach of contract is neither an end in itself nor a means to an end, but merely a foreseeable consequence, then in my opinion it cannot for this purpose be said to have been intended. That, I think, is what judges and writers mean when they say that the claimant must have been "targeted" or "aimed at". In my opinion the majority of the Court of Appeal was wrong to have allowed the action in Millar v Bassey [1994] EMLR 44 to proceed. Miss Bassey had broken her contract to perform for the recording company and it was a foreseeable consequence that the recording company would have to break its contracts with the accompanying musicians, but those breaches of contract were neither an end desired by Miss Bassey nor a means of achieving that end.44.  Finally, what counts as a breach of contract? In Torquay Hotel Co Ltd v Cousins [1969] 2 Ch 106, 138 Lord Denning said that there could be liability for preventing or hindering performance of the contract on the same principle as liability for procuring a breach. This dictum was approved by Lord Diplock in Merkur Island Shipping Corporation [1983] 2 AC 570, 607-608. One could therefore have liability for interference with contractual relations even though the contracting party committed no breach. But these remarks were made in the context of the unified theory which treated procuring a breach as part of the same tort as causing loss by unlawful means. If the torts are to be separated, then I think that one cannot be liable for inducing a breach unless there has been a breach. No secondary liability without primary liability. Cases in which interference with contractual relations have been treated as coming within the Lumley v Gye tort (like Dimbleby & Sons v National Union of Journalists [1984] 1 WLR 67 and 427) are really cases of causing loss by unlawful means.Causing loss by unlawful means: elements of the tort45.  The most important question concerning this tort is what should count as unlawful means. It will be recalled that in Allen v Flood [1898] AC 1, 96, Lord Watson described the tort thus—"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…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.46.  The rationale of the tort was described by Lord Lindley in Quinn v Leathem [1901] AC 495, 534-535:"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 suffer 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."47.  The essence of the tort therefore appears to be (a) a wrongful interference with the actions of a third party in which the claimant has an economic interest and (b) an intention thereby to cause loss to the claimant. The old cases of interference with potential customers by threats of unlawful acts clearly fell within this description. So, for the reasons I have given, did GWK Ltd v Dunlop Rubber Co Ltd (1926) 42 TLR 376. Recent cases in which the tort has been discussed have also concerned wrongful threats or actions against employers with the intention of causing loss to an employee (as in Rookes v Barnard [1964] AC 1129) or another employer (as in J T Stratford & Son Ltd v Lindley [1965] AC 269). In the former case, the defendants conspired to threaten the employer that unless the employee was dismissed, there would be an unlawful strike. In the latter, the union committed the Lumley v Gye tort of inducing breaches of the contracts of the employees of barge hirers to prevent them from hiring the plaintiff's barges.48.  In Stratford, at pp 329-330, Viscount Radcliffe expressed some disquiet about using the question of whether the actual or threatened strike was or would have been in breach of contract as the touchstone of whether the union or its officers were liable for causing loss by secondary action. These remarks were made in the context of industrial relations, where the use of secondary action has since been comprehensively regulated by statute. In principle, the cases establish that intentionally causing someone loss by interfering with the liberty of action of a third party in breach of a contract with him is unlawful.49.  In my opinion, and subject to one qualification, acts against a third party count as unlawful means only if they are actionable by that third party. The qualification is that they will also be unlawful means if the only reason why they are not actionable is because the third party has suffered no loss. In the case of intimidation, for example, the threat will usually give rise to no cause of action by the third party because he will have suffered no loss. If he submits to the threat, then, as the defendant intended, the claimant will have suffered loss instead. It is nevertheless unlawful means. But the threat must be to do something which would have been actionable if the third party had suffered loss. Likewise, in National Phonograph Co Ltd v Edison-Bell Consolidated Phonograph Co Ltd [1908] 1 Ch 335 the defendant intentionally caused loss to the plaintiff by fraudulently inducing a third party to act to the plaintiff's detriment. The fraud was unlawful means because it would have been actionable if the third party had suffered any loss, even though in the event it was the plaintiff who suffered. In this respect, procuring the actions of a third party by fraud (dolus) is obviously very similar to procuring them by intimidation (metus).50.  Lonrho plc v Fayed [1990] 2 QB 479 was arguably within the same principle as the National Phonograph Co case. The plaintiff said that the defendant had intentionally caused it loss by making fraudulent statements to the directors of the company which owned Harrods, and to the Secretary of State for Trade and Industry, which induced the directors to accept his bid for Harrods and the Secretary of State not to refer the bid to the Monopolies Commission. The defendant was thereby able to gain control of Harrods to the detriment of the plaintiff, who wanted to buy it instead. In the Court of Appeal, Dillon LJ (at p 489) referred to the National Phonograph case as authority for rejecting an argument that the means used to cause loss to the plaintiff could not be unlawful because neither the directors nor the Secretary of State had suffered any loss. That seems to me correct. The allegations were of fraudulent representations made to third parties, which would have been actionable by them if they had suffered loss, but which were intended to induce the third parties to act in a way which caused loss to the plaintiff. The Court of Appeal therefore refused to strike out the claim as unarguable and their decision was upheld by the House of Lords: see [1992] 1 AC 448.51.  Unlawful means therefore consists of acts intended to cause loss to the claimant by interfering with the freedom of a third party in a way which is unlawful as against that third party and which is intended to cause loss to the claimant. It does not in my opinion include acts which may be unlawful against a third party but which do not affect his freedom to deal with the claimant. 52.  Thus in RCA Corporation v Pollard [1983] Ch 135 the plaintiff had the exclusive right to exploit records made by Elvis Presley. The defendant was selling bootleg records made at Elvis Presley concerts without his consent. This was an infringement of section 1 of the Dramatic and Musical Performers' Protection Act 1958, which made bootlegging a criminal offence and, being enacted for the protection of performers, would have given Elvis Presley a cause of action: see Lord Diplock in Lonrho Ltd v Shell Petroleum Co Ltd (No 2) [1982] AC 173, 187). The Court of Appeal held that the infringement of the Act did not give RCA a cause of action. The defendant was not interfering with the liberty of the Presley estate to perform the exclusive recording contract which, as Oliver LJ noted (at p 149) was "no more than an undertaking that he will not give consent to a recording by anyone else." Nor did it prevent the Presley estate from doing any other act affecting the plaintiffs. The bootlegger's conduct, said Oliver LJ (at p 153):"merely potentially reduces the profits which [the plaintiffs] make as the result of the performance by Mr Presley's executors of their contractual obligations."53.  It is true that there was no allegation that the defendant intended to cause loss to the plaintiff, although, given that the defendant was selling records in competition with the plaintiff, such an allegation would have been easy to make. But I do not think that it would have made any difference. The wrongful act did not interfere with the estate's liberty of action in relation to the plaintiff. 54.  Likewise in Isaac Oren v Red Box Toy Factory Ltd [1999] FSR 785, one of the claimants was the exclusive licensee of a registered design. The defendant sold articles alleged to infringe the design right. The registered owner had a statutory right to sue for infringement. But the question was whether the licensee could sue. In the case of some intellectual property rights, an exclusive licensee has a statutory right of action: see, for example, section 67(1) of the Patents Act 1977. But the exclusive licensee of a registered design has no such right. So the licensee claimed that the defendant was intentionally causing him loss by the unlawful means of infringing the rights of the registered owner. Jacob J rejected the claim on the principle of RCA v Pollard. The defendant was doing nothing which affected the relations between the owner and licensee. The exclusive licence meant that the licensee was entitled to exploit the design and that the owner contracted not to authorise anyone else to do so. As Jacob J said, at p 798, para 33:"It is true that the exploitation of the licence may not have been so successful commercially by reason of the infringement, but the contractual relations and their performance remain completely unaffected."55.  Lonrho Ltd v Shell Petroleum Co Ltd (No 2) [1982] AC 173 was an attempt to found a cause of action simply on the fact that the conduct alleged to have caused loss was contrary to law. The defendant's conduct was alleged to be a criminal offence but not actionable by anyone. In this respect it was unlike RCA v Pollard and Isaac Oren v Red Box Toy Factory Ltd, in which it could at least be said that the conduct was a wrong against someone in contractual relations with the claimant. Lonrho owned and operated a refinery in Rhodesia supplied by a pipeline from the port of Beira. When Rhodesia declared independence in 1965, the UK imposed sanctions which made it unlawful for anyone to supply the country with oil. As a result, the refinery and pipeline stood idle until the independence regime came to an end. Lonrho alleged that Shell had prolonged the regime by unlawfully supplying Rhodesia with oil through other routes and thereby caused it loss. The House of Lords decided that the alleged illegality gave rise to no cause of action on which Lonrho could rely. Again, there was no allegation that Shell had intended to cause loss to Lonrho, but I cannot see how that would have made any difference. Shell did not interfere with any third party's dealings with Lonrho and even if it had done so, its acts were not wrongful in the sense of being actionable by such third party.56.  Your Lordships were not referred to any authority in which the tort of causing loss by unlawful means has been extended beyond the description given by Lord Watson in Allen v Flood [1898] AC 1, 96 and Lord Lindley in Quinn v Leathem [1901] AC 495, 535. Nor do I think it should be. The common law has traditionally been reluctant to become involved in devising rules of fair competition, as is vividly illustrated by Mogul Steamship Co Ltd v McGregor, Gow & Co [1892] AC 25. It has largely left such rules to be laid down by Parliament. In my opinion the courts should be similarly cautious in extending a tort which was designed only to enforce basic standards of civilised behaviour in economic competition, between traders or between employers and labour. Otherwise there is a danger that it will provide a cause of action based on acts which are wrongful only in the irrelevant sense that a third party has a right to complain if he chooses to do so. As Jacob J said in Isaac Oren v Red Box Toy Factory Ltd [1999] FSR 785, 800:"the right to sue under intellectual property rights created and governed by statute [is] inherently governed by the statute concerned. Parliament in various intellectual property statutes has, in some cases, created a right to sue and in others not. In the case of the 1988 Act it expressly re-conferred the right on a copyright exclusive licensee, conferred the right on an exclusive licensee under the new form of property called an unregistered design right (see section 234) but did not create an independent right to sue on a registered design exclusive licensee. It is not for the courts to invent that which Parliament did not create."57.  Likewise, as it seems to me, in a case like Lonrho Ltd v Shell Petroleum Co Ltd (No 2) [1982] AC 173, it is not for the courts to create a cause of action out of a regulatory or criminal statute which Parliament did not intend to be actionable...

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