Hi SOB
I'm sorry to hear about the position you are in. I would ring the DWP ASAP to get ahold of the assessment report. Writing an MR without it definitely puts you at a disadvantage as you don't know what information the assessor recorded, which led to the decision. It normally takes 7 - 10 days to get the report. When you make that call, you should also tell them you want to put in for an MR. You have four weeks from the date on the decision letter.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems