British Prime Minister Theresa May says she'll resign if her Brexit agreement with the European Union secures enough votes to be ratified by the UK Parliament. She told members of her ruling Conservatives that if they voted for her deal, she would take no part in the next stage of Brexit which would involve negotiating a trade relationship with the EU. But as CGTN'S Richard Bestic reports from London, there are now doubts as to whether she'll be allowed to bring her deal back to Parliament.

The UK Parliament one of the world's oldest representative institutions and Brexit, testing it to the edge of destruction.

RICHARD BESTIC LONDON  "It was UK Prime Minister Theresa May's failure to win Parliament's support for her Brexit Deal with the European Union, which led to MP's rising up and taking power, to find their own acceptable alternatives."

Speculation now that sacrificing her job might get May's twice-defeated deal across the line. Parliamentary Speaker John Bercow said though he'd attempt to stop it returning a third time, unless it's fundamentally changed.

JOHN BERCOW UK HOUSE OF COMMONS SPEAKER "In order that there should be no misunderstanding, I wish to make clear that I do expect the government to meet the test of change."

Parliament's Brexit hijack, as some describe it, follows a weekend which an estimated one million marchers called for the UK to remain in the European Union and a petition on Parliament's website topped six million names. In Brussels, it prompted a call for a long delay to Brexit, allowing the UK to rethink its strategy.

DONALD TUSK PRESIDENT OF EUROPEAN COUNCIL "You cannot betray the six million people who signed the petition to revoke Article 50, the one million people who marched for a people's vote or the increasing majority of people who want to remain in the European Union."

On Monday, MP's will possibly be back here again, poring over favored Brexit alternatives.

RICHARD BESTIC LONDON "There's no guarantee it'll end happily and every possibility that MP's could fail to agree on any way forward. There's even a chance the prime minister's much battered Brexit plan could return. In short, the Brexit campaign continues amid rising political and diplomatic costs. RB, CGTN, London."