We have a multi site setup, on one of the sites there are several news articles
On the second site the requirement is that we can open that content but stay on t hat same site, rather than linking to the other site with a different URL and slightly different styling.
Can this be achieved using custom routes or is this going to be a different issue?
Have you looked into Settings -> Shortcut -> Manage shortcut -> Fetch content from page in Episever CMS?
To give more detail, this is a news index page with news items loaded from find, loading all the news is working as expected. With the above would I have to create shortcuts for each of these news items within the site?