". . . the decisions to which I have already referred provide authoritative guidance (not however to be interpreted as `rigid formulae') as to how this task of the Court should normally be approached, but do not deny the proposition that the ultimate task of the Court is as I have described it."
24 I have endeavoured to approach the present application for interlocutory relief applying the principles as expressed by McLelland J. The matter is put shortly by Meagher, Gummow & Lehane, Equity Doctrines and Remedies, 2nd Edition at para 2168.
"What the plaintiff must prove is that he has a serious, not a speculative, case which has a real possibility of ultimate success and that he has property or other interests which might be jeopardised if no interlocutory relief were granted. Then it becomes a matter of seeing if, in all the circumstances of the case, the Court should nonetheless exercise its discretion by declining to issue an interlocutory injunction."
25 Likewise in Meagher, Gummow and Lehane at paragraph 217 the learned authors say:
"What is meant by saying that the Court must take into account the balance of convenience and the question of hardship is that it must consider carefully what effects the granting of an injunction will have on both parties and in particular whether to grant one would cause hardship to the defendant or to refuse one would cause hardship to the plaintiff."
Specification of breaches - the principles
26 Plainly enough the serious question issue in so far as treating with the attack on the notice of breach, requires that some attention be given to what is the requisite content of such a notice.
27 In FPM Constructions Pty Ltd v Council of the City of Blue Mountains [unreported New South Wales Court of Appeal, 10 October 2001] Basten JA drew attention to a number of authorities dealing with the required content of a notice specifying breach. His Honour observed that what may be sufficient to "specify" a matter sufficiently for a particular purpose has been considered in differing contexts with different levels of precision and detail required.
28 Basten J drew attention to the following observations made by Gleeson C J in Drummoyne Municipal Council v Australian Broadcasting Corporation (1990) 21 NSWLR 135 at 137: