“Moreover, by the use of the word ‘generally’ Mitting J may well only have been indicating what the position is, as it very often is, in many cases and no doubt properly considered so to be; but nevertheless in a way admitting of exceptions. If so, then I would not disagree. But if Mitting J was intending to go further and is to be taken as indicating a fixed rule of invariable application then I am afraid I must respectfully disagree.”