The runway visual range was reported as 400m in fog, which is below the Category 1 approach minima that the Metroliner would have required. The crew had not reported any aircraft malfunction.
PICTURE & GRAPHIC: Crashed Metroliner in Cork identified as EC-ITP
So it may be safe to assume that ATI who are the source of the above have got it correct before they published so now we have it CAT I aircraft confirmed unless they are wrong.