…it does seem clear to me that what the section requires is the knowledge of the person himself, not the knowledge of the hypothetically reasonable person and not the knowledge of a person employed by that person That is particularly the case in a situation such as this, where in order to know whether the claim is or is not justified, some expert advice may be required."
He went on to make further observations as to the question of whether the plaintiff knew at the relevant time that his injury was sufficiently serious to justify bringing an action. He said this (at p 70):
"If a person - or his or her legal representative - commences proceedings and does not meet the threshold, not only will the right to compensation be nullified or reduced, but the person will also be exposed to liability for costs, and because of the requirements of certification, the legal practitioner may also be subject to sanctions. The question of whether or not the bringing of action is justified is not simply a matter of looking at the seriousness of the injury, but also of looking at that injury in the light of the statutory requirements for claiming compensation, and that requires some understanding of the law. In order to know whether the injury is sufficiently serious to justify the bringing of action, a person must know not only that the injury is serious, but also, in approximate terms, whether that injury is sufficient to bring the person over any of the statutory thresholds that now exist."