Advice 1:
If you do anything else, get your medical records. Preferably, get THEIR medical records on you.
They hate telling you anything, so this way you know as much as they do.
You will probably have to pay £50 for this, and they will take 21 days (the max allowed).
Advice 2:
Read EVERYTHING. If you have been flying a while, there will be pages and pages of crap, and some nuggets of information.
The mistakes on mine were staggering. Errors, wrong information fed in by AME's, etc.
One medical a few years ago, I apparently lost 6cm off my height, only to grow back the next year? Why did they not question this?!
Advice 3:
Data protection - get them to put it right.
Advice 4:
Purchase deck-chair, and wait a very long time for anything to happen.
DON'T GIVE UP.
To be honest, the wrong information that goes in can seriously affect your career. I think the law needs changing so you see it before it is put on file. Electronic reporting makes this worse, as there never is a piece of paper they put in your hand.