"From 1987 onwards, [the plaintiff] suffered from a binaural hearing loss which did not prevent him passing regular medical tests to determine whether he was fit to continue in the work for which he was employed. The nature of his injury was known and its extent did not warrant the bringing of an action. His employment was secure, he was passing examinations and attending courses, as his work history (ex "H" to the affidavit of Mr Houlihan) shows. Then, in 1996, he was stood down from the train crews and his income was reduced by $20,000 gross per year. It seems to me that this indicates that the extent of the personal injury, namely its impact upon his economic capacity, changed dramatically. He now had such a loss that, in his own interest, he should bring an action on his right of action. It seems to me that the "extent" of an injury must include the impact that injury has upon the various matters considered in an award for damages for such personal injury. I am satisfied that, when Mr Watters was stood down and it was subsequently confirmed by Dr Robinson that his hearing loss prevented him from carrying out his duties as a train driver, a new fact about the nature and extent of his injury became known to him."