This was never very configurable in Moodle 1.9 and is no better (in fact worse as there is a bug) in Moodle 2. In 1.9 I edited the code to make it display summaries all the time. I'll post tracker items for these.
check the course entry in the Moodle Courses categories (listed by department).
Change this to "edit settings" in the "settings" block.
Note: When a course is available anyone with an LSE username / password can enrol (have access) to it. If you wish to restrict the access of your Moodle course to only your students you can use an enrolment key.
* Moodle 'Teacher/Editors' ONLY
Yes, because people aren't going to read this doc from start to finish, they'll just drop in on the question they want answered. They may not have thought about restricting the course until they read this.