“The test for reasonable apprehension of bias was recently stated by this court in Martin v. Martin, 2015 ONCA 596, 127 O.R. (3d) 1, at para. 68: “Would a reasonable and informed person viewing the matter realistically and practically and having thought it through conclude that the judge, consciously or unconsciously would not decide fairly”. The threshold for finding a reasonable apprehension of bias is extremely high. There is a strong presumption in favour of the judge’s impartiality and the question of a reasonable apprehension requires a highly fact-specific inquiry: Martin, at para. 71.
In Chippewas of Mnjikaning First Nation v. Ontario (Minister of Native Affairs), 2010 ONCA 47, 265 O.A.C. 247, leave to appeal refused, [2010] S.C.C.A. No. 91, at para. 243, this court cautioned:
[A]ppellate courts are reluctant to intervene on the basis that a trial judge “entered the arena” and improperly intervened in a trial. There is a strong presumption that judges have conducted themselves fairly and impartially. Isolated expressions of impatience or annoyance by a trial judge as a result of frustrations, particularly with counsel, do not of themselves create unfairness. Similarly, a trial judge’s willingness to debate with counsel openly over relevant factual and legal issues should not serve as a basis for a reasonable apprehension of bias. In the end, an appellate court should only intervene if satisfied that the trial judge’s interventions, considered in the context of the entire trial, created a reasonable apprehension that the trial judge was biased. [Citations omitted.]