Where can find / is there a demo of this page, so that I can work over the top of it?
If not, how do I go about creating it?
This page is generated from wp-content/themes/polytechnic/author.php. It's not an actual page that you manually create, rather a dynamically generated page built from the user profile in the Users section of the WP Backoffice. So the name, image, bio, and other parameters are managed there. From there, the courses listed are pulled from querying courses assigned to that user.
From there, you can manage the elements on this page via Appearance > Theme Options > Faculty Options > Faculty/Author Outputs (tab).
Let me know if that helps, and if you have any other questions regarding this functionality.