This is the login pge for a real electronic resource licensed by the University: Film and Sound Online. This is the login page you get to if you select this resource from the UL's resources page.
From the standard login page, choose 'Login via the UK Federation' to use Shibboleth (more on the Federation later)
Note that the terminology for how you start a Shibboleth login hasn't stabilised yet, and this may be an obstacle to adoption.