"A solicitor is under a duty not to communicate to others any information in his possession which is confidential to the former client. But the duty extends well beyond that of refraining from deliberate disclosure. It is the solicitor's duty to ensure that the former client is not put at risk that confidential information which the solicitor has obtained from that relationship may be used against him in any circumstances.
Particular care is needed if the solicitor agrees to act for a new client who has, or who may have, an interest which is in conflict with that of the former client. In that situation the former client is entitled to the protection of the court if he can show that his solicitor was in receipt of confidential information which is relevant to a matter for which the solicitor is acting, against the former client's interest, for a new client. He is entitled to insist that measures be taken by the solicitor which will ensure that he is not exposed to the risk of careless, inadvertent or negligent disclosure of the information to the new client by the solicitor, his partners in the firm, its employees or anyone else for whose acts the solicitor is responsible."
29 Lord Millett, with whose reasons the other members of the court agreed, expressed similar views. The issue has been discussed in Australia in a number of cases including Mallesons Stephen Jaques v KPMG Peat Marwick (1990) 4 WAR 357 ("Mallesons Stephen Jaques") and Farrow Mortgage Services Pty Ltd (in liq) v Mendall Properties Pty Ltd [1995] 1 VR 1. I agree with the opinion expressed in Newman bySteytler J at 322, that there is little practical difference between the test in Bolkiah and that adopted in these Australian cases.
30 Unlike Bolkiah and Newman, however,these proceedings were not directed to restraining the solicitors from continuing to act. They were directed to restraining the use that a third party, the ACCC, might make of any confidential information that might have passed to the ACCC in breach of the duty that Phillips Fox owes to Harvey Norman. Nevertheless the extent of the duty goes a long way to justifying Harvey Norman's concern.
31 Mr Sheahan made much of the fact that, in his opinion, Harvey Norman could not have succeeded in this proceeding. This may be so, although in the absence of a hearing on the merits I express no opinion on the point. In this case I see no reason to depart from the general practice that leave to discontinue should be granted and I propose to order accordingly. There is nothing in the circumstances of this case to raise the concerns expressed by Lee J in Cambridge Consolidated NL v Zephyr Minerals NL (above) (see [5] above). No slur is cast on either of the respondents and there is no reason why, if the proceedings are discontinued rather than dismissed, the investigation should be regarded as continuing under a cloud.
32 In relation to the matter of costs, the issue is not whether Harvey Norman could have succeeded but whether the proceedings were reasonably commenced (see [7] above). The fact that a firm of solicitors that was also retained by Harvey Norman was advising the ACCC was a legitimate source of concern. Although the knowledge of the particular lawyers advising Harvey Norman is not imputed to the members of the firm who were advising the ACCC, the likelihood that lawyers in the same firm have shared information is at the very least, an issue to be considered; see Newman at [29] - [32] and the authorities discussed there. The fact that Harvey Norman appears ultimately to have been satisfied that its interests have not been prejudiced does not make the initial concern unreasonable.
33 It would, in my view, be unreasonable to expect Harvey Norman to accept that no confidential information had passed to the ACCC merely on the basis of the ACCC's assurances. This conclusion does not reflect adversely on the ACCC. As mentioned above, confidential information or knowledge could have been passed to the ACCC inadvertently and without the ACCC being aware that this had occurred. Harvey Norman was entitled to satisfy itself that this was not the case.
34 Finally, Mr Sheahan stressed the importance of the regulatory function of the ACCC and the broad-ranging nature of its investigations. There is no doubt that the duties and powers of the ACCC are extensive and of great public importance. This does not, however, detract from the importance of protecting confidential information. Moreover, there is considerable public interest in the role of solicitors as officers of the court and in the administration of justice; Mallesons Stephen Jaques at 361; Carindale at 311; Newman at 315. In the absence of specific legislative provision I would be reluctant to conclude that the public interest in the ACCC's investigation prevails over the public interest in preserving confidence in the administration of justice. Nevertheless, I find no fault with the ACCC's conduct in seeking to preserve the integrity of its investigation. It would appear that once the proceedings were commenced, all parties acted reasonably and promptly in seeking to defend their respective interests and there is no basis for ordering either to contribute to the costs of the other. That being so it is unnecessary for me to consider the issue of indemnity costs.
35 As the motion to discontinue was filed only after all the evidence was in, and Harvey Norman was able to satisfy itself that its interests were not prejudiced, it is appropriate that leave to discontinue should be granted subject to the restriction proffered by Harvey Norman, through its counsel at the hearing, namely that Harvey Norman not commence further proceedings against the respondents in respect of the matters pleaded in the statement of claim without the leave of the Court. Although it was submitted that this restriction should be imposed by way of an undertaking to the Court, in my view it is more appropriate that it be imposed directly by order of the Court.
I certify that the preceding thirty-five (35) numbered paragraphs are a true copy of the Reasons for Judgment herein of the Honourable Justice Stone.