"'The need for appellate caution in reversing the judge's evaluation of the facts is based upon much more solid grounds than professional courtesy. It is because specific findings of fact, even by the most meticulous judge, are inherently an incomplete statement of the impression which was made upon him by the primary evidence. His expressed findings are always surrounded by a penumbra of imprecision as to emphasis, relative weight, minor qualification and nuance … of which time and language do not permit exact expression, but which may play an important part in the judge's overall valuation.' The second point follows from the first. The exigencies of a daily court room life of such that reasons for judgments will always be capable of having been better expressed. This is particularly true of an unreserved judgement such as the judge gave in this case but also of a reserved judgment based upon notes, such as given by the district judge. These reasons should be read on the assumption that, unless he has demonstrated the contrary, the judge knew how he should perform his functions and which matters he should take into account."
"An appellate court should resist the temptation to subvert the principle that they should not substitute their own discretion for that of the judge by a narrow textual analysis which enables them to claim that he misdirected himself. The reason why I have taken some time to deal with the Court of Appeal's assertion that the judge did not realise he was entitled to exercise his own discretion is that I think it illustrates the dangers of this approach."