To share the site first click on the icon thats circled
Once you have done this, the context menu shown will appear. Make sure that under general access you share it with either the college or anyone with link.
To make sure it is shared with at least one memeber of staff type in the tutors email in the box 'add people and groups'
List of emails
Dean.Kirkman@don.ac.uk
Luke.Hilton@don.ac.uk