In London, the September Brent Crude contract was up $4.09 on July 30 to $126.80 per barrel on the ICE Futures exchange. Light Sweet Crude for September delivery climbed $4.85 to $126.77 on the New York Mercantile Exchange, RBC reports.London, the September Brent Crude contract was up $4.09 on July 30 to $126.80 per barrel on the ICE Futures exchange. Light Sweet Crude for September delivery climbed $4.85 to $126.77 on the New York Mercantile Exchange, RBC reports.