The employer's duty, to whomsoever it falls to discharge it, is to take reasonable care to avoid exposing his employee to an unnecessary risk of injury and the employer is bound to have regard to a risk that injury may occur because of some inattention or misjudgment by the employee in performing his allotted task.
This formulation followed and expanded the well-known formulation of the duty by Dixon C.J. and Kitto J. in Hamilton v. Nuroof (W.A.) Pty. Ltd. [10] . In this case, the company's duty of care to its employees fell to be discharged by its executive directors of whom the plaintiff was one. Can he recover for breach of the employer's duty? There have been cases in which an injured employee has failed to recover for breach of an employer's statutory duty where the employee was himself responsible for performing the duty. These are cases where the employee was solely responsible for the failure to perform the duty and was therefore "the sole author of his own wrong" as Pearson J. said in Ginty v. Belmont Building Supplies Ltd. [11] . In Ross v. Associated Portland Cement Manufacturers Ltd. [12] , Lord Reid approved the test which Pearson J. stated in these terms in Ginty [13] :
In my view, the important and fundamental question in a case like this is not whether there was a delegation, but simply the usual question: Whose fault was it?
The question, said Lord Reid, really is: whose conduct caused the accident? That approach avoided the difficulty of [14] :
explaining why an employer, put in breach of a statute by the disobedience of his servant, can escape liability to that servant for injuries caused by the breach he can say to the disobedient servant that his [the employer's] conduct in no way caused or contributed to that servant's injuries.
But if the employer has failed in some respect to do everything which the employer could reasonably be expected to do to prevent the breach which caused a plaintiff's injury, the employer does not escape liability: Boyle v. Kodak Ltd. [15] . As Herron C.J. said in Shedlezki v. Bronte Bakery Pty. Ltd. [16] , in order that the person under the statutory duty might escape liability, "[i]t must be established that the breach by the plaintiff is the sole Cause and not merely a cause of the accident". The principle was stated by Pearson J. in Ginty [11] :
it is not necessarily conclusive for the employer to show that it was a wrongful act of the employee plaintiff which caused the accident. It might also appear from the evidence that something was done or omitted by the employer which caused or contributed to the accident; there may have been a lack of proper supervision or lack of proper instructions; the employer may have employed for this purpose some insufficiently experienced men, or he may in the past have acquiesced in some wrong behaviour on the part of the men. Therefore, if one finds that the immediate and direct cause of the accident was some wrongful act of the man, that is not decisive. One has to inquire whether the fault of the employer under the statutory regulations consists of, and is co-extensive with, the wrongful act of the employee. If there is some fault on the part of the employer which goes beyond or is independent of the wrongful act of the employee, and was a cause of the accident, the employer has some liability.
Subject to a qualification presently to be mentioned, the approach to the question of an employer's escape from liability for breach of statutory duty may be applied with equal validity to the question of an employer's escape from liability for breach of a common law duty. The approach accords with principle. When a plaintiff's injury is caused in part by his own careless act or omission and in part by the negligence of another, the plaintiff is entitled to recover against the other, the damages being reduced according to the plaintiff's share in the responsibility for the damage. If the plaintiff's employer is vicariously liable for the damage caused by the other's negligence or has, by reason of an act or omission of the other, failed to discharge the employer's own duty to the plaintiff - and it is unnecessary in this case to examine the difference between the two bases of liability - the plaintiff is entitled to recover against the employer, the damages being reduced according to the plaintiff's share in responsibility for the damage. Thus, in Stapley v. Gypsum Mines Ltd. [18] , the widow of a workman recovered against his employer where the workman's death was caused by the disobedience by the workman and a co-workman of an instruction not to work under the "drummy" roof of a stope before fetching the roof down. Having failed fully to fetch the roof down, the deceased went to work under it. Part of the roof fell and killed him. The employer was held liable because, both miners being at fault, the causative negligence was joint and the employer was liable for the negligence of the deceased's co-workman.
1. (1982) 56 A.L.J.R. 872, at p. 873; 42 A.L.R. 627, at p. 629.
2. (1956) 96 C.L.R. 18, at p. 25.
3. [1959] 1 All E.R. 414, at p. 424.
4. [1964] 1 W.L.R. 768, at p. 777; [1964] 2 All E.R. 452, at p. 455.
5. [1959] 1 All E.R., at pp. 423-424.
6. [1964] 1 W.L.R., at p. 777; [1964] 2 All E.R., at pp. 455-456.
7. [1969] 1 W.L.R. 661, at p. 667; [1969] 2 All E.R. 439, at p. 442.
8. (1967) 69 S.R. (N.S.W.) 202, at p. 209.
9. [1959] 1 All E.R. 414, at p. 424.
10. [1953] A.C. 663.