Economic Torts in UK Law

Such a proposition is not only inconsistent with the jurisprudence of tortious conspiracy, as Lord Walker has demonstrated and explained, but is inconsistent also with the historic role of the action on the case.

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. Nor does it matter that you ought reasonably to have done so. He took the information in the honest belief that the employee would not be in breach of contract.

Nevertheless, the common thread is striking through a third party who might otherwise be doing business with your target, whether by buying his goods, hiring his barges or working for him or whatever. The refinement proposed by my noble and learned friend, Lord Hoffmann, is entirely consistent with the underlying principles to be deduced from the decided cases. It is also consistent with legal policy to limit rather than to encourage the expansion of liability in this area.

Although my conclusion on the issue of unlawful means makes it unnecessary to decide the point, I would support Arden LJ's view at [127] that it is a defence to an action for conspiracy to injure by unlawful means if the defendant not only acted to protect his own interests, but did so in the belief that he had a lawful right to act as he did.

Compliance with the criminal law is a universal obligation. By comparison, legal duties in tort or equity will commonly and contractual duties will always be specific to particular relationships. Their relevance may depend on the purpose of the relevant statutory provision, which may or may not be consistent with its deployment as an element in the tort of conspiracy. For present purposes it is unnecessary to say anything more about unlawful means of these kinds.

Professor Weir and most other writers, including Hazel Carty and Messrs Sales and Stilitz, are of the view that the gist of all the economic torts is the intentional infliction of economic harm. It is, however, very different from knowledge that economic harm will follow as a result of incidental consequences of conduct, when those consequences are not necessary steps in achieving the object of the conduct and are unsought.

Where, as here, A (Latco) procures B's (Latreefers') breach of his contract with C (the yard), adopting it as his own because he is interested to do so, seeking a benefit for himself or a fortiori a detriment for C, and does so deliberately, knowingly and intending the breach to take place, then A puts himself in the way of incurring a liability, even though not himself a party to the contract, unless (i) he does not directly procure the breach, and (ii) he uses no (relevant) unlawful means, or (iii) he can claim some justification.