How do German citizens feel about the future of the world’s largest trading bloc? Ed Butler visits PSM Protech, a specialist engineering firm in Bavaria where he speaks to its owner Irene Wagner about what the EU means to her company plus he asks Volker Wieland, an economics professor at a Frankfurt University and one of Germany’s five key economic advisors, the so-called Wise Men, what the threats to the EU are. (Picture: Irene Wagner in the PSM Protech factory. Credit: BBC)