LONDON, United Kingdom (AFP) — British Prime Minister Theresa May on Tuesday prepared to head to Brussels for talks on the Brexit crisis, even though EU leaders have refused any renegotiation of the deal she agreed with them in December.

With just five weeks to go until Brexit on March 29, the deal has been blocked by the British parliament and the country appears headed for a chaotic exit that economists warn will wreak havoc in both Britain and the European Union.

May is due to meet European Commission chief Jean-Claude Juncker at 1730 GMT on Wednesday, two days after Brexit Secretary Stephen Barclay and Attorney General Geoffrey Cox visited the EU headquarters.

The visit also comes a day before Jeremy Corbyn, leader of the opposition Labour Party, is expected to meet the EU’s Brexit negotiator Michel Barnier as part of a diplomatic ballet aimed at heading off a no-deal Brexit.

May’s spokesman said the prime minister was “working hard to secure legally binding changes” to the backstop — a controversial part of the withdrawal agreement she signed with EU leaders at a summit in December.

The backstop would keep Britain in the EU customs union and give Northern Ireland a different economic status from mainland Britain until a way is found to ensure there is no return to a hard border with EU member Ireland.

The deal was overwhelmingly rejected by British MPs last month in a vote that united Conservative pro-EU moderates and Brexit hardliners in opposition.

May has since said she will seek to renegotiate the deal to the dismay of European allies who have repeatedly warned her against using time pressure in an attempt to extract concessions.

“The EU need to work with us in order to give parliament the insurance it needs,” May’s spokesman said, adding: “The prime minister believes that she can secure changes in relation to the backstop MPs want — there is a majority in parliament for a deal”.

May’s critics accuse her of wasting time before holding another vote in parliament on her deal, hoping that the looming deadline will change MPs’ minds.

Speaking at a manufacturing conference in London, Corbyn said May was being “extraordinarily reckless” in her Brexit strategy.