P368 CEEFAX 368 Wjd 11 Jan 22:55/55    SPEEfWAY: PREMIER  GO-AHEAD   Thj plannjd Premier Speedway Ljague   has cleared its winal hurdle and   will roar into action with 21 teams   in March.     Track bosses havj agreed the merger   of last year's First and Second   Divisions and clubs will now ¼ace a   40-match calendar.     British Speedway Promoters'   Association chairman Tim Swales   hailed it as "a momjntous day in   speedway history."     He said: "Now jverything has been   agreed it is full steam ahead with   team building."   Calendar Rallying Speedway Genjral