Practice – Parties. The Chancery Division allowed the claiming defendants' application for permission to join CL as a defendant to the counterclaim in a case concerning the alleged infringement of the claimants' copyright in the first defendant company's conduct of its therapy business. The counterclaim alleged that the claimants and CL had been negligent, both in their selection of a particular machine as a mandatory device for the administration of the therapy, and in their insistence on the continued use of the machine after problems allegedly became evident with it. The court held that CL had given direct advice to a number of the defendants, and that it could not be said that the claiming defendants had no real prospect of establishing their allegations against her.