April 26 (Reuters) - Western Areas Ltd (WSA)
- March quarter mine and mill production at 6,778 and 5,672 nickel tonnes - year to date tracking to upper end of guidance
- unit cash cost of production lowest since June 2015 quarter and year to date unit costs are tracking towards lower end of fy17 guidance
- appears that relaxation of Indonesian ore ban will have minor impact on supply with less than 4mt of low grade laterite being approved for export