The contention that the award of damages should be reduced because of contributory negligence is also without merit. The doctrine of contributory negligence as applied to accidents to employees at work was once one of the "unholy trinity" of common law defences (see Fleming, Law of Torts, 5th ed. (1977), p. 486). Now that it is not a defence but only a ground for reducing damages, it is still regarded as an unjust rule (see Fleming, op. cit., pp. 486-491; Munkman, Employer's Liability at Common Law (1975), pp. 582-587). It has been narrowly confined, almost to vanishing point. This Court dealt with it most recently in Commissioner for Railways v. Halley [16] , in which a learner shunter was injured. Under existing industrial conditions, an employee is not free to take such action as he thinks fit but is required to work subject to his employer's control. Employees often become so absorbed in their work that they are inattentive to their own safety. Momentary carelessness is not likely to be prevented or diminished by rules like contributory negligence or even by safety codes (statutory or otherwise) (see G. Schwartz, Contributory and Comparative Negligence: A Reappraisal, Yale Law Journal, vol. 87 (1978) 697, at p. 717 ). It would be unjust if the more an employee concentrates on his employer's task at the expense of his own safety, the more he suffers by reduction of his damages in the event of injury. The test in contributory negligence in an employee's claim is not the same as the test in negligence. If it were, Mr. Ruprecht's continuing to work in conditions which constituted breach of his employer's duty and expose him to unnecessary risk of injury might be regarded as failure to take reasonable care for his own safety. An employee should not be held guilty of contributory negligence unless when he acted (or failed to act) this was done with full appreciation of the danger. Even then, it should not be regarded as contributory negligence if it was done to advance the employer's interests. This means that there must be an element of wilful misconduct by the employee. This approach is reflected in the cases which show that carelessness by an employee due to confusion, fatigue or natural slackening of attention, or preoccupation in what he is doing, is not to be regarded as contributory negligence (see Halley's Case; Carlyle v. Commissioner for Railways [17] ; Flower v. Ebbw Vale Steel, Iron & Coal Co. Ltd. [18] ; Caswell v. Powell Duffryn Associated Collieries Ltd. [19] ).