“A person domiciled in a Member State may also be sued: 1. where he is one of a number of defendants, in the court for the place where any one of them is domiciled, provided that the claims are so closely connected that it is expedient to hear and determine them together to avoid the risk of irreconcilable judgments resulting from separate proceedings”
“Article 6(1) of the Regulation proceeds for the assumption of the abstract risk that the transfer of two judgments to two courts may result in inconsistencies between those judgments … however because this is an abstract risk, the requirement is merely the existence of a sufficiently close connection with the anchor claim.”
“To begin with, there must be a genuine claim, or a claim which is properly brought, against the defendant who is being sued in the courts of his domicile. It is obvious that the claim against this "anchor" defendant cannot be allowed to be an entirely spurious one, and if there is no proper claim against the one defendant, it will be impossible to satisfy the requirement that it be necessary to hear and determine the claims against the two defendants together to avoid the risk of irreconcilable judgments resulting from separate proceedings.”
“It follows that the position of the English defendants will require particular scrutiny; the English defendants serve as “anchor” defendants, as, self-evidently, without claims against them, there would be no basis for invoking article 6(1) against the foreign defendants. In the light of the stay for the Paris arbitration, the eighth defendant can no longer fulfil any such role...”