Claim No: IP-2022-000066 - [2024] EWHC 1369 (IPEC)

“In order to be liable with a principal tortfeasor a defendant had to be proved to have combined with the principal tortfeasor to do, or to secure the doing of, acts which constituted the tort; that that required proof that the defendant had acted in a way which furthered the commission of the tort by the principal tortfeasor and that he had done so in pursuance of a common design to do, or to secure the doing of, the acts which constituted the tort; and that whether the matters relied on by a claimant had any significance to the commission of the tort would depend on the circumstances in each case.”

Although procuring a tort and assisting another to commit a tort pursuant to a common design are distinct bases for imposing accessory liability, they must operate consistently with each other and such that the law of accessory liability in tort is coherent. Considerations of principle, authority and analogy with principles of accessory liability in other areas of private law all support the conclusion that knowledge of the essential features of the tort is necessary to justify imposing joint liability on someone who has not actually committed the tort. This is so even where, as in the case of infringement of intellectual property rights, the tort does not itself require such knowledge.”