LONDON, ENGLAND - APRIL 25: Shadow Secretary of State for Exiting the European Union Sir Keir Starmer delivers a speech on Labour's Brexit policy at the Institute of Civil Engineers on April 25, 2017 in London, England. Labour today outlined its plan for Brexit, which includes guaranteeing the the rights of EU workers in the UK, ahead of the June 8 general election. (Photo by Jack Taylor/Getty Images)