Originally Posted by DiapDealer
Just so we're clear... most ePub rendering engines will honor the page-break-(before|after) CSS attribute in one way or another, but you won't see a "page-break" in Sigil's Book View, not does it have any automated way of inserting elements with the page-break-before attribute associated with it.
Thank you for clarifying (again!).
I had another play around and was wondering this very thing. I think I will leave the CSS this way as it will be honoured by most ereaders and, indeed, seems to work fine in Adobe reader.