LME aluminium set for biggest weekly drop since 2011 A00 aluminium ingot price soared marginally on SMM, alumina price remains stable London aluminium rises, but on track for biggest weekly drop since 2011 SHFE aluminium, nickel prices up on renewed sanction concerns; copper lags METALS-London aluminium slips, on track for biggest weekly drop since 2011 Aluminium down Aluminium climbs on LME; European billet premiums fall from 3-year highs; early labor talks at Escondida unsuccessful