"A judge must then in that assessment have regard to the three components of the defence of loss of control under the Act (and not the former law), undertake a rigorous evaluation of the evidence against those components and set out the conclusion in a reasoned ruling. Provided that is done, bearing in mind the advantages a trial judge has over an appellate court, an appellate court will accord to a reasoned decision of a trial judge (examining the components of the defence of loss of control) the ambit of judgment in the evaluation of the evidence that is open to the judge when making a decision based on that evaluation. In such circumstances, an appellate court will not readily interfere with that judgment."