Thanks for your response.
The main problem is with poems. When I submit a group of poems each poem requires a separate page but doesn't necessarily fill a full page so the page breaks don't transfer consistently. It means that a new poem which I have started at the top of a page often comes out half way down instead of at the top. It's the same with libreoffice and open office and is driving me mad. It seems I'm not the only one, below is a thread from another site but no one seems to have the answer.
When I convert from Pages to Word, and then read the conversion, the page breaks are not in the same place. The conversion in .docx has more lines to the page than the original. In reading the .docx I am of course converting it back to Pages, since I don’t have Word installed, but I assume that the .docx version also has more lines to the page than the Pages original.
Inserting page breaks in the original does not help (and would not be much of a solution for a document of any size).
.pdf gives an exact copy, but sometimes I need to export to Word