"The exigencies of daily court room life are such that reasons for judgment will always be capable of having been better expressed. This is particularly true of an unreserved judgment such as the judge gave in this case … 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. This is particularly true when the matters in question are so well known as those specified in section 25(2) [of theMatrimonial Causes Act 1973 ]. 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."