AS grades and predictions for medicine

So you know how (most) universities use your AS end of year 12 grades for predicted year 13 grades? I think I heard something about universities increasing your grades by one grade, for this purpose? So if you got an A at AS for a given subject, would you be predicted an A* for end of year 13? So a B would result in predicted A for year 13? Is that how this works?

Your school predicts your A level grades, not the university

Oh I see thank you, it's just I thought universities raised your year 12 mock grades by 1 grade, but as you say I think my school does that