[98] As I have indicated, a plaintiff is required to identify an alternative means of eliminating a risk and to provide evidence that the alternative is indeed a practicable one. The plaintiff may be required to lead more evidence (or perhaps technical or expert evidence) as to an alternative and the feasibility of that alternative where the defendant has followed a generally accepted practice - which the Council had in this case. The plaintiff is also required to adduce technical or expert evidence concerning the practicability of the alternative unless it is one where common knowledge or common sense is all that is required to prove the reasonably practicable alternative. However, this was not a case where the jury could use its common knowledge or experience to find that the flags could be moved to another area of the beach because there was no evidence concerning the conditions of the surf and the seabed at other parts of the beach on that day." (footnotes omitted)
17 The plaintiffs referred to [153] - [155] where his Honour Justice Gummow stated:
"[153] While the plaintiff bears the ultimate burden of proving that his or her injuries could have been avoided by some reasonably practicable alternative course of conduct available to the defendant, in some cases, the evidentiary burden which has come to rest upon the defendant may prove decisive of the outcome.
[154] In Nelson v John Lysaght (Australia) Ltd, it was held by this Court that upon the evidence the jury had been entitled to find that the system of work in force where the plaintiff was injured exposed him to a clear risk of injury. The onus lay upon the plaintiff to prove that it was unreasonable of the defendant not to take a suggested precaution, which it had later adopted. However, Gibbs J pointed out:
[W]hen the [defendant], which must have had full knowledge of the nature, cost and practical consequences of the new installation, gave no evidence, and by its counsel asked no questions, to suggest that it was inordinately expensive or in any other way disadvantageous, the jury was entitled to infer at the very least that the advantages of the method which the [defendant] has since adopted were not outweighed by any disadvantages.
[155] Here, also, the Council, as indicated above, led no evidence and asked no questions upon critical matters. The Council's witness, Mr Nightingale, was the person well placed to give evidence upon these matters. It was open to the jury to infer, for example, that the Council could have moved the flags. In the circumstances of the trial, the Council had carried at least an evidentiary onus to lead evidence that no reasonably practicable alternative course of conduct was open to it." (footnotes omitted)
18 These passages from Swain do not establish that the plaintiff must in its statement of claim plead that there was a reasonably practicable precaution or alternative course of conduct that could have been avoided or reduced the consequences of damages suffered by the plaintiffs. Those passages are focussed on the burden of proof and the evidence required to establish whether or not there was a reasonably practicable precaution or alternative course of conduct that could have avoided or reduced the consequences of damage.
19 There are two relevant rules in the UCPR. They are Rules 15.1 and 15.5 which read:
"15 Pleadings must give all necessary particulars