"Representatives of law firms appear for clients where there is an actual or potential conflict of interest often enough for it to be a matter of grave concern to the Court. Where the acts or omissions of the law firm, including situations where the actions of the client are based on advice given by the solicitors, are at the heart of the question in issue, the firm is, in a real sense, 'defending' its actions or advice. There is, in such circumstances, a danger that the client will not be represented with the objectivity and independence which the client is entitled to and which the Court demands. There is no sound reason to presume or accept that the solicitors must first have the opportunity to clarify whether their client is liable as a result of their actions or of acting on their advice before confronting the conflict.
What I have said, of course, does not apply where the advice given is unrelated to liability or the question in dispute. Advising a client to prosecute or defend a claim does not attract these observations. They are restricted to the situation where the acts or omissions of the solicitors are an integral part of the other party's complaint or the client has been sued in circumstances where he or she was acting on the advice of their solicitors and it is effectively that advice which is in issue. In such cases, apart altogether from the position of the client, the Court is not receiving the assistance of counsel who are observably independent. Independence is a function of counsel. The Court is entitled to assume that solicitors and counsel appearing before it possess that independence. Solicitors not only owe a duty to their clients to do the best for them but also owe an overriding duty to the Court. The same overriding duty is owed by counsel who have been granted a right of audience to appear in this Court. As part of their professional responsibility, therefore, solicitors and counsel must ensure that they do not appear in a matter in which they have an actual or potential conflict of interest or where, by reason of their relationship with their client, their professional independence can be called in question. (See also the New Zealand Law Society, Rules of Professional Conduct for Barristers and Solicitors (2nd ed, 1993), R 1.03 and commentary.)"