[28] The respondent's knowledge in 1995 was different from what it was in 1990 in one critical respect: he had been advised that he had a justifiable claim for hearing loss. Until then he had no reason to think that the deterioration in his hearing was of such an extent or had occurred in such circumstances as to show that an action against the appellant would have reasonable prospects of success. Then he became aware that the loss (or some of it) might be attributable to his work. It is true that he knew he worked in a very noisy environment and there is some force in the argument that a person working in such an environment ought to consider the possibility that it is the cause of a perceived loss of hearing, whatever its extent. However the respondent did not do so because he had always been provided with ear plugs which he swore he always wore. He said, "Being a charge hand and a first-aid officer, I felt that it was incumbent on me to set a good example to the other employees by wearing ear plugs at all times whilst working". That evidence was unchallenged in cross-examination. Indeed it was put to him (and he agreed) that the appellant enforced and policed the wearing of ear protection. He further deposed, "Up until the hearing test conducted on 7th August 1995, I was under the impression that the ear plugs were giving me adequate protection, and that I had very little, if any, loss of hearing." It was put to him that he must have drawn a conclusion that there could have been a link between the noisy work environment and his deteriorating hearing, but he responded that he accepted that the hearing protection given to him was good enough to stop him going deaf. That response was unchallenged. In the circumstances (including his pre-employment hearing loss) it was a reasonable belief for him to hold.