(a) there are intertwined issues of fact or law between the separated question and the other questions such that the determination of the separate question will not have any substantial effect upon the width of the field of litigious controversy or the prospect of the settlement of the balance of the litigation: Law Society of NSW v Bruce (unreported, Supreme Court of NSW, 23 April 1996, per Rolfe J), Parramatta Stadium Trust v Civil and Civic Pty Ltd (unreported, Supreme Court of NSW, 27 August 1996, per Hunter J).
(b) where there is a commonality of witnesses and issues of credit as between the separate issue and other issues in the case which will or may necessitate a ruling on the credit of one or more of the common witness, thus possibly precluding that same judicial officer from again dealing with the matters going to the credit of the common witness in accordance with the decision of the Court of Appeal in Australian National Industries Ltd v Spedley Securities Ltd (in liq ) (1992) 26 NSWLR 441 : Story of Sydney Pty Ltd v Ling (unreported, Supreme Court of NSW 15 November 1994, per Rolfe J), Century Medical v THLD [2000] NSWSC 5; (unreported, Supreme Court of NSW, 3 February 2000, per Rolfe J).
(c) there is a possibility that the resolution of the separate issue will not finally determine the issue but will merely result in an appeal from that decision in relation to that separate issue, creating a multiplicity of proceedings, interruption to the court and undesirable fragmentation of the proceedings: Story of Sydney Pty Ltd v Ling (supra), Century Medical v THLD (supra).
(6) The experience of courts suggests that the separation of proceedings often does not result in the quicker and cheaper resolution of proceedings as anticipated, but often has the reverse effect, merely causing added delay and expense to the resolution of the litigation. Thus, before an issue is to be separately determined, it must be possible to clearly see that it will facilitate the quicker and cheaper resolution of the proceedings: Tallglen v Pay TV Pty Ltd (supra, at 142 per Giles CJ in Comm D), Parramatta Stadium Trust v Civil and Civic Pty Ltd (supra), Century Medical v THLD (supra).
16 In applying these principles to the facts of a particular case Studdert J declined to order a separation of issues stating that there would not be a sufficient saving of time and the plaintiff would have to give evidence twice, as would medical practitioners: Murphy v Chow [2003] NSWSC 303.
17 On the other hand, in Richard v Rahilly [2002] NSWSC 943 Newman AJ considered the questions of expense and convenience and ordered a separation of the issues notwithstanding that some of the expert reports overlapped on issues of liability and quantum. His Honour observed that this is the case in most common law actions for personal injuries. However, his Honour observed that the degree of overlapping was not of such an order that the court could conclude the defendant had discharged its burden to show that the order should not be granted.
18 I also have in mind the cautionary remarks of judgments of the High Court in relation to the inconvenience that can occur when isolating separate questions in proceedings at first instance: see Perre v Arpand Pty Limited (1999) 198 CLR 180 at [436] per Callinan J; Tepko Pty Ltd v The Waterboard (2001) 206 CLR 1 at [168] - [170] per Kirby and Callinan JJ; and at [52] per Gaudron J.
19 This question of procedure involves a discretion focused upon the facts and circumstances of a particular case, but bearing in mind the principles which I have endeavoured to summarise.
20 The thrust of the defendant's opposition to the orders sought is that there is an absence of an adequate evidentiary foundation to justify making the orders. It is true that the only evidence tendered consists of a solicitor's affidavit, and it is true also that certain portions of that affidavit were not admitted on the basis that they expressed views not within the expertise of a solicitor. There is no specialist medical evidence that has been tendered.
21 Nevertheless, some aspects of the case seem to be self-evident. First, it is clear that the plaintiff is incapable, at her present age, of giving evidence as to problems she may be having as a result of the injury. Secondly, I think it is reasonably plain that the plaintiff and her legal advisers have a difficulty in assessing the extent of damage at this time and the elapse of some period of time before an attempt by this Court to quantify damages, if any, would be conducive to the interests of justice to both parties. Furthermore, it is an obvious point that if the plaintiff is unable to establish liability then the defendant is saved the costs of dealing with a hearing as to quantum.
22 In these circumstances, I think it is more appropriate for the question of liability to be severed. The question of quantum of damages may prove to be academic, but if not it can be dealt with at a later date. The usual rule is frequently departed from in cases of this kind and I am unable to see any real prejudice flowing to the defendant as a result of this course.
23 Accordingly, I make the order sought in the notice of motion that the issues be severed. It is agreed that costs should be costs in the cause.