British Prime Minister Theresa May faces a growing threat that she will be forced to delay Brexit, a move that risks a showdown with eurosceptics in her Conservative Party just weeks before Britain is due to leave the European Union.
With Britain's Brexit crisis going down to the wire, May is struggling to get the kind of changes from the EU she says she needs to get her divorce deal through a deeply divided parliament and smooth the country's biggest policy shift in more than 40 years.
In Egypt's Sharm el-Sheikh for an EU/Arab League summit, she met the bloc's leaders to try to win support for her efforts to make her deal more attractive to parliament, where frustrated MPs are gearing up to try to wrest control of Brexit from the government.
Her decision to push back a vote on her deal into March, just days before Britain is due to leave, has prompted lawmakers to step up attempts to stop a no-deal Brexit, a scenario many businesses say could damage the world's fifth largest economy.
Several of their plans would involve extending Article 50, which triggered the two-year Brexit negotiating period, delaying Britain's departure beyond March 29 - something May has said would only delay an inevitable decision.
A government official said ministers were "considering what to do if parliament makes that decision" (does not pass the deal), when asked about a possible extension.
"If we cannot get this deal across the line, we are facing the prospect of having to extend," defence minister Tobias Ellwood told BBC radio.
The EU has said it will consider an extension to the Brexit process, but only if Britain can offer evidence that such a delay would break the deadlock in parliament.
At the EU/Arab League summit, May met German Chancellor Angela Merkel and Dutch Prime Minister Mark Rutte - a clear bid to get their support for her attempt to get substantive changes to a deal agreed in November.
But she faces increasing frustration in Brussels, which has rebuffed her attempts to reopen the agreement so far.
May needs to find a way to assuage concerns in Britain over the Northern Irish "backstop", an insurance policy to prevent the return of a hard border, and possible focus for renewed violence, between the British province of Northern Ireland and EU-member Ireland.
But with her efforts taking more time than expected, officials on both sides are increasingly suggesting a delay.
So far, May has stuck to her line that she intends to lead Britain out of the EU on March 29.