Brexit begins: UK triggers Article 50 to begin EU divorce

Britain's Prime Minister Theresa May speaks in the House of Commons in London in this image taken from video Wednesday March 29, 2017. May will announce to Parliament that Britain is set to formally file for divorce from the European Union Wednesday, ending a 44-year relationship, enacting the decision made by U.K. voters in a referendum nine months ago and launching both Britain and the bloc into uncharted territory. (Parliamentary Recording Unit via AP)

Britain's Prime Minister Theresa May leaves 10 Downing Street in London on March 25, 2019. - British Prime Minister Theresa May chaired a meeting of her cabinet amid reports of an attempted coup by colleagues over her handling of Brexit. (Photo by Isabel Infantes / AFP) (Photo credit should read ISABEL INFANTES/AFP/Getty Images)

Pro-EU demonstrators wave an mixed EU and Union flag as they protest against Brexit, outside of the Houses of Parliament in central London on June 11, 2018. - After a rollercoaster week of Brexit rows within her government and with Brussels, British Prime Minister Theresa May will on Tuesday seek to avoid another setback in a long-awaited showdown with parliament. MPs in the House of Commons will vote on a string of amendments to a key piece of Brexit legislation that could force the government's hand in the negotiations with the European Union. (Photo by Daniel LEAL-OLIVAS / AFP) (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)

Pedestrians waling through Waterloo Bridge with the skyline of the City of London in the background on October 27, 2016. Britain's economy won a double boost on October 27 on news of faster-than-expected growth following its vote for Brexit and a pledge by Nissan to build new car models in the UK. Gross domestic product expanded by 0.5 percent in the third quarter, official data showed. / AFP / Daniel Leal-Olivas (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)

Cyclists pass a sign calling for no border to be imposed between Ireland and Northern Ireland outside Newry, Northern Ireland, on November 14, 2018 near the Irish border. - British Prime Minister Theresa May defended her anguished divorce deal with the European Union before rowdy lawmakers on Wednesday before trying to win the backing of her splintered cabinet with the so-called "Irish backstop" arrangement to guard against the imposition of a hard border between Ireland and Northern Ireland one of the contentious issues, according to reports. (Photo by Paul FAITH / AFP) (Photo credit should read PAUL FAITH/AFP/Getty Images)

EU supporters, calling on the government to give Britons a vote on the final Brexit deal, wave EU flags as they participate in the 'People's Vote' march in central London, Britain March 23, 2019. REUTERS/Henry Nicholls