I think what I'm trying to do is probably quite simple but I can't for the life of me figure it out. I need to add space above the text on an ebook title page, and also I need to add some space above each of the chapter headings.
For the title page, I've tried Object Export Options > Custom Layouts > Space Before but no matter what value I input it has no effect - the text still appears at the top of the page on the exported EPUB.
For the space at the start of each chapter, I've tried adding things in the paragraph style but it seems lots of information gets discarded on export to EPUB.
The only Paragraph Style that your suggestion works on is my HEADER style (which is the chapter title). This leads me to think that my problem might have something to do with where InDesign is splitting the EPUB. The other pages where this doesn't work don't seem to have splits before them. Does that make sense?