Theresa May is due at a summit in
Brussels, hours after Conservative rebels in
the Commons defeated the government in a key Brexit vote.
the Commons defeated the government in a key Brexit vote.
MPs backed an amendment giving them a legal guarantee of a vote on the final Brexit deal struck with Brussels.
One rebel, Stephen Hammond, was sacked by the prime minister as a party vice chairman in the aftermath of the vote.
Other EU member states could decide to move forward to trade talks with the UK at their two-day summit.
The
negotiations are first expected to focus on agreeing a temporary
arrangement that will begin as soon as the UK leaves the EU in March
2019.
On the eve of the summit, Mrs May suffered her first Commons defeat
as prime minister by just four votes, as MPs backed an amendment to the
EU Withdrawal Bill by 309 to 305.
Labour leader Jeremy Corbyn said it was a "humiliating loss of authority" for the prime minister.
Unless it is overturned by the government at a later stage, it means
MPs will get to vote on the final deal reached with Brussels before it
is ratified.
The government had previously offered a vote. But
critics wanted a guarantee that this would be "meaningful", claiming the
bill gave ministers the power to bypass Parliament in implementing the
withdrawal agreement.
Dominic Grieve MP, who tabled the amendment, said the bill "couldn't be allowed to stay in the condition it was in".
The
former attorney general, told BBC Two's Newsnight: "The right thing is
carrying out Brexit in an orderly, sensible way, which has a proper
process to it."
He said Parliament's ability to interfere with
Brexit negotiations was "limited", adding: "I've been studious in not
trying to interfere with the government's negotiating strategy, I've
hardly asked a question."
And speaking to BBC Radio 4's Today programme, former transport
minister Mr Hammond denied the prime minister had been undermined by the
vote.
"I think, frankly, last night was avoidable and there is dismay on all sides that it got to where it did," he added.
Asked
about calls from fellow Tory MPs to deselect rebels, he said: "I make
it a cardinal rule not to be rude about my colleagues in public and I'm
not going to start now."
The government said in a statement: "We
are disappointed that Parliament has voted for this amendment despite
the strong assurances that we have set out.
"We are as clear as ever that this Bill, and the powers within it, are essential.
"This amendment does not prevent us from preparing our statute book for
exit day. We will now determine whether further changes are needed to
the Bill to ensure it fulfils its vital purpose."
Speaking after the vote, ministers said the "minor setback" would not prevent the UK leaving the EU in 2019.
What does it mean?
BBC political editor Laura Kuenssberg
It's
the first time that Theresa May has been defeated on her own business
in the Commons. She has to front-up in Brussels with other EU leaders
only hours after an embarrassing loss in Parliament.
Beyond the
red faces in government, does it really matter? Ministers are divided on
that. Two cabinet ministers have told me while it's disappointing, it
doesn't really matter in the big picture.
It's certainly true that
the Tory party is so divided over how we leave the EU that the
Parliamentary process was always going to be very, very choppy.
But
another minister told me the defeat is "bad for Brexit" and was openly
frustrated and worried about their colleagues' behaviour.
The EU Withdrawal Bill is a key part of the government's exit strategy.
Its
effects include ending the supremacy of EU law and copying existing EU
law into UK law, so the same rules and regulations apply on Brexit day.
MPs have been making hundreds of attempts to change its wording - but this is the first time one has succeeded.
Unless
the government manages to overturn it further down the line, it means a
new Act of Parliament will have to be passed before ministers can
implement the withdrawal deal struck with Brussels.
Ministers had
made several efforts to placate the Conservative rebels, and argued that
Mr Grieve's amendment would put unnecessary time pressure on the
government if talks with the EU continued until the last minute.
And
minutes before the vote, they offered a last-minute promise of action
at a later stage of the bill's journey through Parliament.
Some Conservatives said this had changed their minds. But Mr Grieve said it was "too late".
There was an often heated debate in the Chamber before the crunch vote on the amendment.
Critics said the rebels were trying to "frustrate" Brexit and tie the government's hands.
After
the result was announced, one of the rebels, former cabinet minister
Nicky Morgan, tweeted: "Tonight Parliament took control of the EU
Withdrawal process."
But other Conservative MPs reacted angrily, with one, Nadine Dorries, saying the rebels should be deselected.
Source: bbc