House of Commons
Parliament

The motion was not amended (because John Baron's amendment was defeated), so MPs are now voting on the government's motion, as it stands on the order paper.

We'll see the results in about 15 minutes.

House of Commons
Parliament

Tory MP John Baron's amendment (amendment f) is defeated by a majority of 576.

The votes for the amendment were 24 for and 600 against.

Now MPs move on to the main vote, on the government's motion.

House of Commons
Parliament

Labour MP Tulip Siddiq who has delayed her caesarean section to vote on Theresa May's Brexit deal today, is in the Chamber in a wheelchair.

Earlier today, Ms Siddiq tweeted to say she had "no faith in the pairing system", which is when two members from opposite parties agree not to vote when the other is absent.

Image source, HoC

Laura Kuenssberg
BBC political editor

BBC political editor Laura Kuenssberg says even if Theresa May's deal is defeated, the prime minister could cling on.

"In other times a prime minister facing a defeat on their main reason for being, their central policy - they would be out the door," she says.

"But Brexit ripped up the rule book long ago."

MPs are currently voting on Conservative MP John Baron's amendment.

If this passes, then it will be added to the government motion to approve the withdrawal agreement - if that too is agreed to.

MPs who wish to vote for the amendment pass "to the right" of the Commons chamber in that lobby, whereas "noes to the left" move to the left of the chamber.

There are two tellers for each division lobby, so four people come back and report the vote result.

Votes take around 15 minutes each.

BBC News Channel

House of Commons
Parliament

Conservative MP John Baron has moved his amendment (amendment f) which gives the UK the right to terminate the Northern Ireland backstop without the agreement of the EU.

It is backed by cross-party group of Brexiteers, including 12 Conservatives, one independent and one DUP MP.

MPs have divided to vote on this amendment.

House of Commons
Parliament

Conservative MP Sir Edward Leigh then declines to move his amendment (which was amendment b), "in light of what the prime minister has said".

The amendment:

• Made clear the Northern Ireland backstop is temporary and should remain temporary
• Called for assurance that, if the backstop doesn't end by the close of 2021, this will be treated as a fundamental change of circumstances and would terminate the Withdrawal Treaty on 1 January 2022.

House of Commons
Parliament

Jeremy Corbyn and SNP Westminster leader Ian Blackford do not move their amendments - which are amendment a and amendment k.

That's a surprise to many in the Chamber but it means MPs move onto the next amendments.

House of Commons
Parliament

Neither the Labour leader nor the SNP leader moves their amendments.

House of Commons
Parliament

Image source, HoC

Theresa May says Jeremy Corbyn's speech was "long on criticism and short on coherence".

She says: "Everything he does is designed to avoid taking any difficult decisions."

"The question is, what is position? He has failed in his responsibility to provide a credible alternative to the government of the day."

She says: "This is the most significant vote that any of us will ever be part of in our political careers...the time has now come for all of us to make a decision. A decision that will define our country for decades to come.

"We know the consequences of voting the deal," she says, but MPs do not know the consequences of voting against it.

"A vote against this deal is a vote for division, uncertainty and a very real threat of no deal."

House of Commons
Parliament

Image source, HoC

Moving on to the Northern Ireland backstop, Theresa May says the government is not able to accept Tory MP Sir Edward Leigh's amendment which makes clear the Northern Ireland backstop is temporary and should remain temporary.

"This is not a commitment to the EU, it is a commitment to the people of Ireland and Northern Ireland that we will honour the Belfast Agreement," she says.

Theresa May says she shares the concerns of MPs who are worried about undermining the strength of the United Kingdom "as a proud unionist" herself.

She adds that the UK needs an insurance policy "to guarantee there will not be a hard border if the future relationship is not in place in time".

"The insurance policy is essential and all models including Norway and Canada require the insurance policy, which is the so-called backstop," she says.

It certainly looks - and sounds - busy in the house.