The UK could be offered a Brexit delay to 22 May on the condition MPs approve the PM’s deal next week, a draft European Council document says.
The draft says the EU is considering delaying Brexit beyond 29 March, but it says no extension is possible beyond the European elections.
In Brussels, the PM spoke to leaders to try to get their backing for a delay.
The BBC’s Katya Adler said these were draft decisions, and leaders were continuing discussions.
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EU leaders are meeting in Brussels to discuss Mrs May’s request for a three month delay to the UK’s departure from the EU.
BBC Brussels correspondent Adam Fleming said Theresa May spoke to EU leaders for 90 minutes and was asked several times what her contingency plans were if she lost the third “meaningful vote” on her deal in Parliament.
French President Emmanuel Macron has warned that if MPs vote down Mrs May’s EU withdrawal agreement next week, the UK will leave without a deal.
“In the case of a negative British vote then we’d be heading to a no deal. We all know it. And it’s essential to be clear in these days and moments,” said Mr Macron, as he arrived at the summit.
EU Brexit negotiator Michel Barnier said that a short Brexit delay “should be conditional on a positive vote next week in the House of Commons”.
“We have done our best, now the solution is in London,” he said.
How the day will unfold (timings are approximate):
- EU leaders are discussing whether to grant the UK’s request and examining other Brexit options
- 18:00 GMT – Press conference by European Council President Donald Tusk and European Commission President Jean-Claude Juncker
- 18:30 GMT – Working dinner
- Mrs May is also expected to make a statement
On her arrival in Brussels, Mrs May said she “sincerely hopes” the UK will leave the EU with a deal and she is still “working on” ensuring Parliament’s agreement.
She said that she had “personal regret” over her request to delay Brexit, but said it will allow time for MPs to make a “final choice”.
Mrs May said: “A short extension gives us that opportunity to decide to leave the European Union, to deliver on that result of that referendum and I sincerely hope that will be with a negotiated deal.”
She added: “I’m still working on ensuring that Parliament can agree a deal so that we can leave in an orderly way.”
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Earlier, speaking in the German Parliament, Angela Merkel said the EU could meet Mrs May’s request to delay Brexit if in the next week there was a “positive vote” on the withdrawal agreement in the UK Parliament.
The German Chancellor said European elections at the end of May would have to be considered during discussions on the suggested extension deadline of 30 June, adding: “But of course we can certainly talk about a short term extension.”
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