ESA Medical

I'm due to have a WCA medical next week re migration from IB to ESA (been on IB for many years) My questions are:

1) Will the Atos Dr/Nurse assessor have seen the IB50 form I completed last Sept for my review (only communication since return of this form was from Atos to book medical date); or do I need to ensure that I tell the assessor all the information that I included on my IB50 form about how my chronic pain and disability affects my life?

2)Should I take a copy of my IB50 with me?

3)At the WCA medical after the limited capability for work assessment test if that's passed, does the Dr/Nurse then do the limited capability for work related activity assessment whilst you're there, or is this undertaken at a different date by a decision maker?

Thanks