@3d4b19d1 no, just adding tags to the scheduled post, in the tags box
@2d6fed24 That's the problem. You need to add them to the 'Share this post' box.
@3d4b19d1 yes so presumably I have to put both the excerpt AND the tags into that box, which I've already set elsewhere Which is the bit that I find frustrating as the text is already in existing fields that Wordpress can read. I shouldn't need to copy stuff between fields.
@3d4b19d1 thanks for the help though!