I tried your suggestion and as I suspected it does pose problems for later when I'm adding bits and pieces to the document. I did however find a slightly inelegant fix, in placing a paragraph break before each heading. It prevents the heading format showing up on the previous page, but does mean that there is an extra blank line on the top of each page. Are there any symbols or commands or whatever that have the same properties of a pilcrow, without adding a line space?

Cheers

oh and I've tried using line breaks, with the same initial problem being encountered.