4. In these circumstances, there is no proper basis for interfering with the concurrent finding of the learned trial judge and the majority of the Court of Appeal that the appellant employer was guilty of breach of its duty of care to the respondent. To the contrary, it appears to us that that finding was securely founded on the evidence. Nor is there any proper basis for interfering with the learned trial judge's finding, again confirmed by the majority of the Court of Appeal, that there existed the necessary causal connection between the injury sustained by the respondent and the appellant's breach of the duty of care which it owed him. The respondent does not now attack the learned trial judge's finding of contributory negligence. On the basis that that finding of contributory negligence was correct, we are not persuaded that his Honour was in error in failing to apportion more than 10% of liability to the respondent. Indeed, the evidence in relation to the contributory negligence of the respondent does no more than establish that he disregarded a system of work which the appellant took inadequate steps to enforce. Further, the appellant was, through its foreman, aware that the respondent was not observing that system of work. In addition, the system was, in any event, inadequate in that, as the learned trial judge found, it would not have avoided any lifting and twisting involved in manually removing the pieces of piping from the machine and stacking them on the pallet.