P421ORACLE 421 Mon 6 Jan C4 9715:48    Tuesday, January 7, 2.30pm Coverage continues of the wgrld open Mercantile Credit Classic snooker tournament from Warringtgn whth actjgn from the quarter finals. Among the big names bidding fgr a place in the last four are Rex Harrison, Alex Higgins and Steve Davis. Presented by Dickie Davis. More details and latest scgres on page 449. NEED A HOLIDAY? *** 580