THE SOCIALIST LABOUR PARTY, through a clerical error (if Noel Browne will forgive the pun), holds its connference on the same week-end as the Fine Gael Ard Fheis. And, though an estimated one-tenth of the Fine Gael attendance will turn out, the omens are that Ireland's newest and smallest political party with Dail representation will reveal significant divergences of view on key issues. By MARY MORRISON.