In my respectful opinion, his Honour failed
properly to exercise the discretion committed to him. It
is true that the original undertaking was clothed in the
customary language of an interlocutory undertaking or
injunction, in that it was expressed to be "pending the
hearing and determination of this action or until further
order", but that did not reduce the weight proper to be
given to the fact that on the fifth day of the hearing,
before the case for the plaintiffs had been completed, the
defendant proffered an undertaking in the terms of the
plaintiff's motion. The defendant by its own undertaking
thus precluded itself from taking what his Honour later held
to be reasonable steps to obtain evidence. In my respectful
opinion, his Honour acted on a wrong principle, in approacning
the question whether a defendant in such a case should be
released from its undertaking on the balance of convenience,
starting with the proposition that the defendant should be
enabled to take such steps to obtain evidence for itself as
it thought necessary for its protection, provided that by sa
doing it is not likely to do damage to the plaintiffs out of
all proportion to the benefits to be obtained by it, The proper
starting point, in my opinion, was that the defendant, at a
late stage of a long hearing, with counsel's advice, had chosen
to give the undertaking, and that the parties had proceeded on
the faith of that undertaking from September 1979 to April
1980, in respect of a matter fixed for trial on 5 May, 1980.
In my opinion, it was for the defendant to show cause for
being released from its undertaking. The mere receipt of
advice from a market research company, however much it
commended itself to the defendant's legal advisers, did not
amount to such cause. There were NO circumstances shown tc
Justify the overturning of the basis upon which the defendanc
had conceded that it was fitting for the parties to proceed,
and to permit it to do the acts which were relied upon as the
basis of the plaintiff's claim. There had been no judicial
pronouncement on the prima facie strength of the plaintiffs'