8 It is well established that a judicial officer should not recuse without adequate cause. The principle to be applied was enunciated by Mason J in Re J.R.L, Ex Parte C.J.L (1986) 161 CLR 342 at 351:
"The problem is governed by the principle that a judge should disqualify himself from hearing, or continuing to hear, the matter if the parties or the public entertain a reasonable apprehension that he might not bring an impartial and unprejudiced mind to the resolution of the issues: Reg. v Watson; Ex parte Armstrong (1976) 136 CLR 248 at pp 258-263; Livesey v NSW Bar Association (1983) 151 CLR 288, at pp 293-294. This principle, which has evolved from the fundamental rule of natural justice that a judicial officer should be free from bias, reflects a concern with the need to maintain public confidence in the administration of justice. This concern is expressed in the cognate principle that, not only must justice be done, it must be seen to be done.
It seems that the acceptance by this Court of the test of reasonable apprehension of bias in such cases as Watson (1976) 136 CLR 248 and Livesey (1983) 151 CLR 288 has led to an increase in the frequency of applications by litigants that judicial officers should disqualify themselves from sitting in particular cases on account of their participation in other proceedings involving one of the litigants or on account of conduct during the litigation. It needs to be said loudly and clearly that the ground of disqualification is a reasonable apprehension that the judicial officer will not decide the case impartially or without prejudice, rather than that he will decide the case adversely to one party. There may be many situations in which previous decisions of a judicial officer on issues of fact and law may generate an expectation that he is likely to decide issues in a particular case adversely to one of the parties. But this does not mean either that he will approach the issues in that case otherwise than with an impartial and unprejudiced mind in the sense in which that expression is used in the authorities or that his previous decisions provide an acceptable basis for inferring that there is a reasonable apprehension that he will approach the issues in this way. In cases of this kind, disqualification is only made out by showing that there is a reasonable apprehension of bias by reason of prejudgment and this must be 'firmly established': Reg. v Commonwealth Conciliation and Arbitration Commission; Ex parte Angliss Group (1969) 122 CLR 546, at pp 553-554; Watson (1976) 136 CLR at p 262; Re Lusink ; Ex parte Shaw (1980) 55 ALJR 12 at p 14;…Although it is important that justice must be seen to be done, it is equally important that judicial officers discharge their duty to sit and do not, by acceding too readily to suggestions of appearance of bias, encourage parties to believe that by seeking the disqualification of a judge, they will have their case tried by someone thought to be more likely to decide the case in their favour."