Normally with the mail you've mentioned here, there're supposed to be 2 attachments. One for RPRF and one with your file number mentioned pdf, where there are the medical instructions. At least in my case it was like this.
Also, I've seen an earlier case where the person got only the MR but even after a few months no RPRF was sent. I forgot what happend in the end.
You should raise a CSE mentioning that you've received only one attachement of MR but no attachments of RPRF. And as SGVO tends to miss CSEs, you should also send them an email. If they really "missed" the RPRF attachment, they should send it as soon as they get your mail, and if they've really intended to skip the RPRF now, then they wont probably answer. But you should be clear from your side.
Hope you get your RPRF very soon. Cheers.