MCC courses are seperate from CRM courses.
The basic CAA requirement is that you have classroom sessions with 20hrs in a simulator.
The MCC course I did consisted of briefings in the classroom with topics ranging from why crew cooperation is important to looking at several case studies of accidents (mostly controlled flight into terrain) and actual cockpit data recordings illustrating breakdowns in SOPs. We had lots of discussions too.
We then prepared ourselves for the sim part of the course. We had 20 hrs in the simulator, 4 hrs for each session, where the two of you swapped between pilot flying and non-pilot flying. The sessions built up to a finale where we flew a sector resulting in technical problems requiring a divert en-route. All the time we were practising following SOPs, discussing issues thrown at us and coming to an agreed resolution.
I found it one of the most useful courses I had taken during my flight training.