"[16] Plainly, in the case of judgments given before Re B-S the Court of Appeal must have regard to and make appropriate allowance for that fact. The focus must be on substance rather than form. Does the judge's approach as it appears from the judgment engage with the essence? Can it be said, on a fair and sensible reading, not a pedantic or nit-picking reading - that the judge directed his mind to and has provided answers to the key questions. [17] [...] Nor, to take another example, will the mere fact that the judgment does not engage with matters referred to in paragraph 74 of Re B-S. What is crucial is the effect of the judgment read as a whole."