See my answer above. If you really have extenuating circumstances, and you don't seem very sure of it, it should have been dealt with at the time via the school and with supporting documentation. It isn't credible to bring it up later.
I have got extenuating circumstances...the unis that I've shown the doctors note to have accepted it....so have the exam board.....I just dont know how to go around writing about the year after leaving school....I dont really want to change my personal statement too much because it got me 3 interviews last year, so should have been quite succesful.....my plan is to go on a Biological sciences course and then reapply aswell (to unis that accept you when youve aready started another course)...I;m just styruggling about whether to justify my Alevel results etc.