OK thanks, I think that’s cleared it up for me.
The p.scenebreak approach is best.
theduck: I see that nbsp inside <div> before </p> works as you say, That makes it a little neater.
Incidentally I’m gonna stick with the <div> approach for this project. I’m correcting paragraph structure in Sigil’s book mode. Ctrl+return splits the paragraph and inserts <p><br /></p> - and I can find/replace or regex this into shape when I’m done. I would use the other approach if there was a customisable keystroke to modify the <p> tag like the header keystrokes do. Clips won’t work quite like this unless I’m mistaken.