I don't think so Tel. Xara can only publish a website, not a single page of a website. It does allow to publish 'only changed pages' but due to Xara's method of numbering images this may need to publish more than the single page.

Reason for requiring this is that I put together the design from my Desktop (which in hospital at the moment) and a tablet, they have got a little out of sync and I need really to just update one page. Also a colleague inputs to the site so the same problem applies.
I don't understand the problem here.