Britain's opposition Labour party leader Jeremy Corbyn attends the debate in Parliament ahead of the vote on British Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Labour party leader Jeremy Corbyn addresses Parliament after the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video.

Secretary of State for Wales Alun Cairns walks outside the Houses of Parliament in London, Britain, after the result was announced on Prime Minister Theresa May's Brexit deal, January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

Prime Minister Theresa May addresses Parliament after the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video.

A general view of Parliament after the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video. Reuters TV via REUTERS

Britain's Chancellor of the Exchequer Philip Hammond arrives in Downing Street after the result was announced on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

A protester folds EU flags after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

Anti-Brexit protester Steve Bray (R) packs away placards into his car after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

An anti-Brexit sign is seen as protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Prime Minister Theresa May sits down in Parliament after the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video

A pro-Brexit sign is seen outside the Houses of Parliament after the result was announced on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

A pro-Brexit protester holds a banner as anti-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Pro-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Anti-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

British Prime Minister Theresa May addresses Parliament ahead of the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video.

An anti-Brexit protester clears the area after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

Anti-Brexit protester Steve Bray packs away placards into his car after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

A pro-Brexit protester holds a banner as anti-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019. REUTERS/Henry Nicholls - RC15F5D508C0

Protesters are seen next to an anti-Brexit banner depicting British Conservative Party MP Jacob Rees-Mogg as they demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Pro-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Britain's Secretary of State for Digital, Culture, Media and Sport Jeremy Wright leaves the Houses of Parliament after the result was announced on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Anti-Brexit protester Steve Bray packs away placards into his car after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

Anti-Brexit protesters demonstrate outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

British lawmaker Anna Soubry speaks during an event outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Prime Minister Theresa May addresses Parliament after the vote on May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video.

Protesters react after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

Anti-Brexit protester Steve Bray (R) packs away placards into his car after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

An anti-Brexit protester demonstrates outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain January 15, 2019.

Britain's Attorney General Geoffrey Cox addresses Parliament ahead of the vote on May's Brexit deal, in London, Britain, January 15, 2019.

MP Tulip Siddiq sits in a wheelchair after the vote on British Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019 in this screengrab taken from video.

Anti-Brexit campaigners from global activism group Avaaz take part in a demonstration with a mock Titanic, outside parliament in Westminster in London, Britain, January 15, 2019.

Anti-Brexit protester Steve Bray packs away placards into his car after the result was announced on Prime Minister Theresa May's Brexit deal, outside the Houses of Parliament in London, Britain, January 15, 2019.

A London tour bus passes a pro-Brexit and anti-Brexit demonstration outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.

Anti-Brexit banners are seen during a demonstration outside the Houses of Parliament, ahead of a vote on Prime Minister Theresa May's Brexit deal, in London, Britain, January 15, 2019.