Opel is cutting production at two German plants as demand falls for its Corsa and Insignia models after the Brexit vote.In a statement on August 19, Opel said, "We can confirm that there will be short-time work in the plants in Russelsheim and Eisenach during the course of this year." The UK is GM's fourth-largest market and best-selling market for the Corsa and Insignia.GM’s CFO Chuck St...