A video grab from footage broadcast by the UK Parliament's Parliamentary Recording Unit (PRU) shows Britain's Prime Minister Theresa May giving a statement to the House of Commons in London on November 15, 2018, on the draft withdrawal agreement negotiated between the European Union and the United Kingdom. British Prime Minister Theresa May suffered a huge blow on Thursday when her Brexit secretary quit as she tried to sell her proposed EU withdrawal agreement to a divided parliament. May insisted that while the negotiations had not been comfortable, it was the best Britain could hope for when it leaves the EU on March 29. - RESTRICTED TO EDITORIAL USE - NO USE FOR ENTERTAINMENT, SATIRICAL, ADVERTISING PURPOSES - MANDATORY CREDIT " AFP PHOTO / PRU " / AFP / PRU / HO / RESTRICTED TO EDITORIAL USE - NO USE FOR ENTERTAINMENT, SATIRICAL, ADVERTISING PURPOSES - MANDATORY CREDIT " AFP PHOTO / PRU "