The LMS only allows access to the course content on enrolment. Users can view the summary page but not access the course itself without enrolling.

The problem with URL protection is that it looks to me like it will stop users who do not wish to take out a group subscription but rather purchase an individual course. This would be done via the LMS cart (or VirtueMart). Once enrolled the user would be directed to the course URL which CB Subs would then block.

Ah, I see; thank you for clarification.

I plan to implement your recommendation above i.e. create a CB field with a value for each plan (e.g. 1,2,3) then use CB Query on login to check that the member of the respective plan is enrolled (see what course are in the subscription, check if the member is enrolled and if not enrol the member). This field can then be automatically reset by CB Subs on expiration. When a new course is added this will be added to the query.

Hopefully I have understood this correctly.

Yes, you understood perfectly. Although if you want the field to support multiple values you may need to update it with SQL Actions so you can do a more complex query to remove a single value, etc..

The links appear to be working fine, please try the below.

forge.joomlapolis.com/projects/cb-cbqueries?jump=welcome

As do I, please let us know how it goes!