TIMELINE-BP oil spill litigation at a glance

Sept 4 (Reuters) - BP Plc was found "grossly negligent" on Thursday by a federal judge in connection with its role in the 2010 Gulf of Mexico oil spill. The decision by U.S. District Judge Carl Barbier in New Orleans, who oversees litigation related to the disaster, is likely to boost the British oil company's costs emerging from the biggest offshore spill in U.S. history. :