October 11 -- Brexit means Brexit, Theresa May says, but a London court this week will decide whether it’s up to her to decide when the U.K. leaves the European Union. The prime minister’s most senior legal adviser, Attorney General Jeremy Wright, will attempt to convince a judge that May can trigger Article 50 of the Lisbon Treaty, which starts an exit, without approval from her fellow lawmakers. Failure would force the issue into the House of Commons and the House of Lords, both of which were largely pro-EU. The lawsuit, which has hearings scheduled for Oct. 13 and 17, could delay the exit for a year, or lead to its derailment altogether. Crossbridge Capital Head of Investments Manish Singh discusses with Guy Johnson in London and Caroline Hyde in Frankfurt on "Bloomberg Markets: European Open."