[29] In light of my conclusion as to the way in which I propose exercising the discretion, it is not necessary for me to make a determination as to the quantum of further security. I should record, however, that, on the material before me, had I been persuaded to order further security for costs, the amount required would have been a further $40,000 up to and including the first day of trial. Notwithstanding the sum sought in the application, evidence filed by the defendants of a costs assessor, Mr Ensor, estimated the defendants' costs (including of this application) from now until the first day of trial to be some $72,000. That assessment, whilst relevant, would not have been determinative. Also relevant, of course, would be the amount of the existing security for costs. Having regard to the established proposition that an order for security for costs is not an indemnity, and also having appropriate regard to the work to be done between now and the trial, I would have considered it appropriate to increase the total amount of security to $100,000, and hence would have fixed the further sum required at $40,000.