“… you owe a duty of confidentiality to your client (including former clients) and this requires you to keep that client’s affairs confidential and not to disclose them to anybody unless you have the client’s consent or disclosure is required by law. [The code of conduct] requires that you disclose to any existing client all information that is relevant and material to their matter. Therefore you would be obliged to disclose to your new clients (the Thukral family) any relevant and material information you are aware of as a consequence of acting for WAPL and [Mr Patel] but couldn’t because this information is confidential to that former client. Outcome O (4.3) [of the code of conduct] requires that where these two duties come into conflict your duty of confidentiality takes precedence and we would usually advise that you should not act for the new client.” [Emphasis added.]
“… where you are an individual who has responsibility for acting for a client or supervising a client's matter, you disclose to the client all information material to the client's matter of which you are personally aware, except when: a) the client gives specific informed consent to non-disclosure ….”
“[It] is incumbent on a plaintiff who seeks to restrain his former solicitor from acting in a matter for another client to establish (i) that the solicitor is in possession of information which is confidential to him and to the disclosure of which he has not consented and (ii) that the information is or may be relevant to the new matter in which the interest of the other client is or may be adverse to his own. Although the burden of proof is on the plaintiff, it is not a heavy one. The former may readily be inferred; the latter will often be obvious… Whether founded on contract or equity, the duty to preserve confidentiality is unqualified. It is a duty to keep the information confidential, not merely to take all reasonable steps to do so. Moreover, it is not merely a duty not to communicate the information to a third party. It is a duty not to misuse it, that is to say, without the consent of the former client to make any use of it or to cause any use to be made of it by others otherwise than for his benefit. The former client cannot be protected completely from accidental or inadvertent disclosure. But he is entitled to prevent his former solicitor from exposing him to any avoidable risk; and this includes the increased risk of the use of the information to his prejudice arising from the acceptance of instructions to act for another client with an adverse interest in a matter to which the information is or may be relevant. …. It is … difficult to discern any justification in principle for a rule which exposes a former client without his consent to any avoidable risk, however slight, that information which he has imparted in confidence in the course of a fiduciary relationship may come into the possession of a third party and be used to his disadvantage. Where in addition the information in question is not only confidential but also privileged, the case for a strict approach is unanswerable. Anything less fails to give effect to the policy on which legal professional privilege is based. It is of overriding importance for the proper administration of justice that a client should be able to have complete confidence that what he tells his lawyer will remain secret. This is a matter of perception as well as substance. It is of the highest importance to the administration of justice that a solicitor or other person in possession of confidential and privileged information should not act in any way that might appear to put that information at risk of coming into the hands of someone with an adverse interest. … Many different tests have been proposed in the authorities. These include the avoidance of “an appreciable risk” or “an acceptable risk.”
‘78. It is trite law that a final injunction is a discretionary remedy, but it does not follow that the court must weigh the interests of the other client against the interests of the client who has otherwise satisfied the requirements for the grant of an injunction against his former solicitors to protect his confidential information. Instead, the discretion must be exercised in accordance with established principles and it is clear from Lord Millet's disapproval of the balancing exercise undertaken by the New Zealand Court of Appeal in Russell McVeagh McKenzie Bartleet & Co v Tower Corporation[1998] 3 NZLR 641 that the impact of the claimed injunction on Mr Pinchuk is not a relevant consideration when deciding whether to grant the Claimants' application.’
“[The Thukrals] wish to pursue a claim arising from the possession order obtained by Western Avenue Properties Limited … over the valuable freehold land and property situate at 600 to 610 Western Avenue ….”