Anti-Brexit demonstrators hold placards and wave flags outside the Houses of Parliament in London, Britain, on Jan. 9. 2019. Britain's Brexit debate in the House of Commons on the proposed agreement on the terms of the UK's withdrawal and the future relations with the EU started Wednesday ahead of a vote scheduled for Jan. 15. (Xinhua/Tim Ireland)

Anti-Brexit demonstrators hold placards and wave flags outside the Houses of Parliament in London, Britain, on Jan. 9. 2019. Britain's Brexit debate in the House of Commons on the proposed agreement on the terms of the UK's withdrawal and the future relations with the EU started Wednesday ahead of a vote scheduled for Jan. 15. (Xinhua/Tim Ireland)

Flags of EU and the United Kingdom are seen outside the Houses of Parliament in London, Britain, on Jan. 9. 2019. Britain's Brexit debate in the House of Commons on the proposed agreement on the terms of the UK's withdrawal and the future relations with the EU started Wednesday ahead of a vote scheduled for Jan. 15. (Xinhua/Tim Ireland)

Pro-Brexit demonstrators hold placards outside the Houses of Parliament in London, Britain, on Jan. 9. 2019. Britain's Brexit debate in the House of Commons on the proposed agreement on the terms of the UK's withdrawal and the future relations with the EU started Wednesday ahead of a vote scheduled for Jan. 15. (Xinhua/Tim Ireland)

Pro-Brexit demonstrators hold placards outside the Houses of Parliament in London, Britain, on Jan. 9. 2019. Britain's Brexit debate in the House of Commons on the proposed agreement on the terms of the UK's withdrawal and the future relations with the EU started Wednesday ahead of a vote scheduled for Jan. 15. (Xinhua/Tim Ireland)