Fresh uncertainty clouds British Prime Minister Theresa May’s plan to begin negotiations on the U.K.’s exit from the European Union. The British High Court last week ruled that May’s government must consult with Parliament before proceeding on the Brexit negotiations. Olivier Chatain , professor of strategy and business policy at the HEC Paris business school, and a senior fellow at Wharton’s Mack Institute of Innovation Management , and Michelle Egan , a professor at American University’s School of International Service, discuss the potential implications of that ruling. They spoke on the Knowledge at Wharton show, part of  Wharton Business Radio on SiriusXM channel 111 . (Listen to the podcast at the top of this page.) Five takeaways from their discussion: More Uncertainty The British High Court ruling creates “a bit more uncertainty” on when Article 50 of the European Union will be invoked, says Chatain. The British government has indicated that it would appeal the decision.…