British Prime Minister Boris Johnson leaves 10 Downing Street in London, Britain, on Oct. 3, 2019. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31. (Photos: Ray Tang/Xinhua)

British Prime Minister Boris Johnson leaves 10 Downing Street in London, Britain, on Oct. 3, 2019. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31.

British Prime Minister Boris Johnson leaves 10 Downing Street in London, Britain, on Oct. 3, 2019. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31.

Photo taken on Oct. 3, 2019 shows the Houses of Parliament in London, Britain. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31.

British Prime Minister Boris Johnson leaves 10 Downing Street in London, Britain, on Oct. 3, 2019. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31.

Photo taken on Oct. 3, 2019 shows the Houses of Parliament in London, Britain. British Prime Minister Boris Johnson urged politicians in the House of Commons Thursday to back the new proposals he has submitted to Brussels to pave the way for Britain to leave the European Union on Oct. 31.