While Parliament is in recess, use the time to get acquainted with Article 207, 217 & 218. Dan Damon speaks with Catherine Barnard, professor in European Union Law and Employment Law at the University of Cambridge, as she prepares us for what happens next in the negotiations. The BBC's Political Correspondent Ben Wright is on hand to give analysis from Westminster. (IMAGE: A pro-remain protester holds up an EU flag with one of the stars symbolically cut out in front of the Houses of Parliament shortly after British Prime Minister Theresa May announced to the House of Commons that Article 50 had been triggered- CREDIT: OLI SCARFF/AFP/Getty Images)