It looked like it might not be enough, as a key Northern Ireland party said it would not be supporting the deal.
May’s announcement came as lawmakers sought an alternative to May’s unpopular deal after wrestling control of Parliament’s agenda away from her Brexit-weakened government.
May has been under mounting pressure from pro-Brexit members of her Conservative Party to quit. Many Brexiteers accuse her of negotiating a bad divorce deal that leaves Britain too closely tied to the bloc after it leaves.
Several have said they would support the withdrawal deal if another leader took charge of the next stage of negotiations, which will determine Britain’s future relations with the EU.
In a packed meeting of Conservative legislators described by participants as “somber,” May finally conceded she would have to go, although she did not set a departure date.
“I am prepared to leave this job earlier than I intended in order to do what is right for our country and our party,” she said, according to a transcript released by her office.
Anti-EU lawmaker Jacob Rees-Mogg, who has clashed with May throughout the Brexit process, said she had been “very clear” that if Britain leaves the EU as foreseen on May 22, she will quit soon after.
He said the prime minister had been “very dignified.”
“She put her case well, and reiterated that she had done her duty,” he said.
It was unclear whether May’s offer to resign would be enough to win backing for her deal, which was defeated by 230 votes in January and by 149 votes earlier this month.
High-profile Brexiteer Boris Johnson announced soon after May’s statement that he would support the agreement, which he has previously called a “humiliation.” Johnson is a likely contender to replace May as prime minister.
But other hard-liners said they would continue to reject the deal, and Northern Ireland’s small but influential Democratic Unionist Party refused to budge in its opposition to the deal.
The DUP’s support was seen as key to persuading other Brexiteers to back the deal. But the staunchly pro-British party fears a provision designed keep an open border between EU member Ireland and the U.K.’s Northern Ireland after Brexit would weaken the bonds between Northern Ireland and the rest of the U.K.
“We cannot sign up to something that would damage the Union,” DUP leader Arlene Foster told Sky News.
Asked if the party might abstain instead, DUP lawmaker Nigel Dodds tweeted: “The DUP do not abstain on the Union.”
Two years ago, Britain triggered a countdown to departure from the EU that ended Friday, March 29, 2019. With that date approaching and no Brexit deal approved by Britain, the EU last week granted a delay. It said that if Parliament approves the proposed divorce deal this week, the U.K. will leave the EU on May 22. If not, the government has until April 12 to tell the 27 remaining EU countries what it plans to do: leave without a deal, cancel Brexit or propose a radically new path.
With May clinging to her Plan A — getting her deal approved — lawmakers this week seized control of the parliamentary timetable for debate and votes Wednesday on a range of Brexit alternatives, in a bid to stop the country from tumbling out of the bloc within weeks with no exit plan in place.
They voted on eight widely varying options that underscored the divisions in Parliament — and the country — over Brexit. These included leaving the EU without a deal, staying in the bloc’s customs union and single market, putting any EU divorce deal to a public referendum, and canceling Brexit if the prospect of a no-deal departure gets close.
Lawmakers were being asked to vote yes to all of the options they could accept. The plan is for the most popular ideas to move to a second vote Monday to find an option that can command a majority. Parliament would then instruct the government to negotiate it with the EU.
May has said she will consider the outcome of the votes, although she has refused to be bound by the result.
The government condemned lawmakers’ move to seize control because it upends the usual practice in which the government sets the timetable for debate and votes.
But Conservative lawmaker Oliver Letwin, one of those behind Wednesday’s votes, said “this is not an insurgency.”
“This process has come about as a result of the increasing concern that many of us have had across the House of Commons that we were heading not towards an approval of the prime minister’s deal, but alas towards a no-deal exit,” he said.
May, meanwhile, still hopes to bring her deal back for another vote by lawmakers.
Brexit Secretary Stephen Barclay said he had introduced a motion to have Parliament meet Friday if needed for a vote.
But it remained unclear whether it would go ahead. House of Commons Speaker John Bercow said he would not accept another vote on the twice-rejected deal unless substantial changes were made.
Wednesday’s votes could potentially produce conflicting and inconclusive results. But they could push Britain in the direction of a softer Brexit that keeps Britain closely tied economically to the EU.
That would probably require the U.K. to seek a longer delay, although that would mean participating in May 23-26 European Parliament elections.
Many EU officials are keen to avoid the messy participation of a departing member state.
But the chief of the European Council told European lawmakers that the EU should let Britain take part if the country indicated it planned to change course on Brexit. Donald Tusk said the bloc could not “betray” the millions of Britons who want to stay in the EU.
“They may feel they are not sufficiently represented by the U.K. Parliament but they must feel that they are represented by you in this chamber. Because they are Europeans,” Tusk said.
