If liability in negligence for nervous shock caused by the death, injury or peril of another in a road accident fell to be determined by reference to an unqualified test of reasonable foreseeability, there would be no proper basis for excluding liability on the part of the injured person, her or his estate or her or his compulsory third party insurer for mere psychiatric injury which was sustained by another as a result of the self-inflicted death, injury or peril of the negligent person in circumstances where the risk of such psychiatric injury was reasonably foreseeable: cf. Bourhill v. Young's Executor [70] . Nor, on an unqualified test of reasonable foreseeability, would there be any rational basis for excluding liability to a close relative or friend who has no contact with the accident or its immediate aftermath but who suffers reasonably foreseeable nervous shock by reason of constant social contact, as loyal nurse or companion, with the injured victim. It is conceivable that, if left to develop by analogy and logical necessity on a case by case basis, the common law in Australia may eventually change to the extent that it comes to recognize liability in some or all of such cases. It has not, however, recognized any such liability up to now. These are but two examples of types of case in which judicial abrogation of the operation of a proximity requirement or any other special control to limit liability for nervous shock would, unless the law were to revert to strict and rigid general notions of causation and remoteness of damage which were discarded in the wake of the Wagon Mound Cases [71] or to the narrow approach to reasonable foreseeability which, apparently, enjoys some lingering support in at least some United States jurisdictions (see, e.g., Dillon v. Legg [72] : "excluding the remote and unexpected"; Hathaway v. Superior Court of Fresno County [73] ; Yandrich v. Radic [74] ), involve the peremptory imposition of liability where the law, up to now, has recognized none. What, one is led to ask, is the pressing demand of principle or policy which necessitates the unqualified destruction of any such overriding limitation upon reasonable foreseeability? The answer, for this country, is that there is none. In so far as principle is concerned, both general principle and the general framework of the law of negligence allow, as has been seen, room for the operation of special overriding rules to exclude, in certain areas, the implication of a duty of care by reference to the ordinary test of reasonable foreseeability and recognize the requirement of proximity as a general overriding requirement of the law of negligence which may operate, in an appropriate case, to preclude or confine the prima facie duty to take reasonable care to avoid a reasonably foreseeable risk of injury to another. In so far as policy is concerned, the arguments for and against the removal of any overriding control of the test of reasonable foreseeability in cases of mere psychiatric injury are finely balanced and, as Lord Scarman pointed out in McLoughlin [75] , more appropriate for legislative than judicial consideration. While the present case does call for a reassessment of the effect of the operation of the requirement of proximity and any other overriding control upon the test of reasonable foreseeability in cases of mere nervous shock, neither principle nor considerations of public policy require or justify the conclusion that no such requirement or control is operative in such cases. In that regard, it is relevant to note that Lord Scarman and Lord Bridge of Harwich appear, in their speeches in McLoughlin , not to have excluded completely the possibility that some overriding limitation on reasonable foreseeability might be appropriate in addition to the general refinement that, in cases of mere psychiatric injury, risk of injury in that particular form must have been reasonably foreseeable. Lord Scarman [76] confined his statement that "common law principle requires the judges" to apply an "untrammelled" reasonable foreseeability test to "circumstances were it is appropriate". Lord Bridge [77] appears to have restricted his acceptance of an unqualified foreseeability test in cases of mere psychiatric injury to cases where such injury is caused by the death, injury or apprehended injury of someone other than the person whose negligence was responsible for the accident, that is to say, of someone who was, in any event, a "negligent tortfeasor". Once mere psychiatric injury is accepted as sounding in damages for the purposes of the law of negligence and as being, in an appropriate case, reasonably foreseeable in the relevant sense, the duty of care in respect of a foreseeable risk of mere psychiatric injury is an independent and primary duty owed to the person at risk of such injury: see, per Barwick C.J. and Taylor J., Scala v. Mammolitti [78] and per Windeyer J., Pusey [79] . That being so, that function performed by any rule confining the existence of a duty of care to avoid such injury to the case where there has been some breach of a duty of care owed to some other person to avoid ordinary bodily injury is that of an overriding control of the test of reasonable foreseeability.