Mahler: Symphony No 8 in E flat The 1975 season of Henry Wood Promenade Concerts opens tonight with Mahler's' Symphony of a Thousand.' BBC2 joins with Radio 3 in stereo to relay this massive, triumphant work direct from the Royal Albert Hall. EDDA MOSER (soprano) LINDA ESTHER GRAY (soprano) WENDY EATHORNE (soprano) ELIZABETH CONNELL (mezzO-SOp) BERNADETTE GREEVY (contralto) ALBERTO REMEDIOS (tenor) SIEGMUND NIMSGERN (baritone) MARIUS RINTZLER (bass) BBC SINGERS BBC CHORAL SOCIETY SCOTTISH NATIONAL ORCHESTRA CHORUS, WANDSWORTH SCHOOL CHOIR . BBC SYMPHONY ORCHESTRA leader eli GOREN conductor PIERRE BOULEZ Introduced by CORMAC RIGBY Director RODNEY GREENBERG