‘... A conspiracy to injure by unlawful means is actionable where the claimant proves that he has suffered loss or damage as a result of unlawful action taken pursuant to a combination or agreement between the defendant and another person or persons to injure him by unlawful means, whether or not it is the predominant purpose of the defendant to do so.’ [198]So long as each individual conspirator knows the central facts and entertains the same object it is not necessary that all conspirators join the agreement at the same time (Kuwait Oil at paragraph 132). The requirement for knowledge includes ‘blind-eye’ knowledge (see Bank of Tokyo v Baskan Gida[2009] EWHC 1276 (Ch) ; [2010] Bus LR D1 at paragraphs 837–840). ‘Take a case where a defendant seeks to advance his own business by pursuing a course of conduct which he knows will, in the very nature of things, necessarily be injurious to the claimant. In other words, a case where loss to the claimant is the obverse side of the coin from gain to the defendant. The defendant’s gain and the claimant’s loss are, to the defendant’s knowledge, inseparably linked. The defendant cannot obtain the one without bringing about the other. If the defendant goes ahead in such a case in order to obtain the gain he seeks, his state of mind will satisfy the mental ingredient of the unlawful interference tort.’