Katya Adler
Europe Editor

The BBC's Europe editor Katya Adler says there are strikingly different moods in Westminster and Brussels tonight.

In the House of Commons, MPs are feeling "energised" at finally having a chance to shape the Brexit outcome, she says.

"That contrasts very starkly with the dark mood here in Brussels among many who see so much division, so late in the day that they feel there is a creeping inevitability towards a no-deal Brexit, something that they have been so very keen to avoid," she says.

Laura Kuenssberg
BBC political editor

Theresa May has always had a difficult hand to play, and she has just used up the last card, offering MPs a final bargain: "Back my deal, and I'll quit."

In the big picture of Brexit it was always an option that in the end, the prime minister might offer up her own position as leverage for support in return.

But big political moments are still a surprise when they come.

Before the announcement, one of her senior colleagues told me he didn't know what she was going to do - she was tucked away somewhere in the House of Commons with her chief of staff, working out her options.

Read more from Laura here

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Conservative MP Nigel Huddleston says he abstained on many of the indicative vote options this evening as he wants the focus "to be on getting the prime minister's deal through".

He says he believes many others have done the same.

On how many MPs are shifting sides, Mr Huddleston tells the BBC "there are lots of discussions going on in the tea room - but it's hard to say how many" will switch.

He adds that the government "might" need some Labour votes, and calls for MPs in leave seats "to think carefully about whether they want more years of chaos".

"Despite all the criticism, Parliament is reflecting the divisions in the country," Mr Huddleston says.

Image source, AFP

The ERG say there was an enormous standing ovation for Steve Baker who spoke at the 1922 Committee meeting this evening.

Mr Baker was hugged by Jacob Rees-Mogg and others at the top table.

"There is no way enough votes are coming out of that room to put the withdrawal agreement through," a spokesperson for the ERG said.

Mr Baker told fellow ERG members that he's "consumed with a ferocious rage after that pantomime".

House of Commons
Parliament

Image source, HoC

Shadow Brexit minister Matthew Pennycook confirms that Labour will be voting in favour of the law to enact the delay to Brexit tonight, describing it as "necessary".

He says those who have voiced disapproval with the process by which ministers are seeking to extend Article 50 are only doing so because they want the UK to leave at the end of this week.

All that would be achieved by rejecting the legislation is "complete confusion", he says.

Steve Baker, deputy chairman of the ERG, made a "highly emotional" speech to his fellow Conservative Brexiteers.

BBC political correspondent Iain Watson has the quotes:

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Justice Secretary David Gauke says at the moment there is enough to be focusing on without wondering about who will replace Theresa May.

Mr Gauke says "the context has changed and a lot of MP are now saying they will support the deal."

He adds that he hopes that Theresa May's vote gets through in the next few days "through a meaningful vote or however else we need to do it".

He notes that some MPs are concerned that Brexit will not happen if the deal is not passed in the next few days.

House of Commons
Parliament

Image source, HoC

Brexit Minister Robin Walker says he regrets the need to bring forward the secondary legislation to change the Brexit date.

He says it is "absolutely critical" that the Commons approves the legislation, as if not it would create "confusion across the statute book".

However he says if it is rejected, it would not change the fact that the date for Brexit has already changed in international law due to the decision of EU leaders last week.

But rejection would create confusion and legal uncertainty for individuals and businesses, he adds.

Image source, Reuters

This all depends on how soon Mrs May resigns (if she does) after her Brexit deal goes through (if it does).

The Conservative leadership contest starts with all the candidates being whittled down to just two, by a string of secret ballots of MPs.

One leadership candidate is eliminated in each round until only two are left

This whittling down can be finished in around a fortnight or so.

The next stage would be expected to take around six weeks. The two candidates who are left would campaign for support with Tory party members across the country.

So, by this timetable, if Mrs May passes her Brexit deal by the end of this week and resigns immediately afterwards, a new Conservative leader could be in place as early as the first week of June.

But if she waited until 22 May - the date the UK will leave the EU if Mrs May's deal is passed - the leadership replacement process will be finished by mid-July.

Mrs May is due to represent the UK at the annual G20 summit in Osaka, Japan, on June 28. Could it be her last outing with global leaders as PM?

South East Cornwall MP and ERG rebel Sheryll Murray says the PM has now “done enough” to win her support if Meaningful Vote 3 takes place on Friday.

Voting on the eight different Brexit options has finished – the results will be announced later.

Business in the Commons is now resuming with a debate on the secondary legislation required to change the date for Brexit in UK law.

The statutory instrument, external will allow for the Brexit date to be changed to 22 May if the PM’s deal is approved by the Commons before the end of this week.

If it is not, the new date for Brexit will be 12 April. EU leaders have said this would provide more time to get a deal through, or for the UK to "indicate a way forward".

Image source, Reuters

The DUP has not dropped its opposition to the Brexit deal despite the prime minister's promise to step down if MPs backed it, a party source has said.

The source told BBC News NI's political editor Mark Devenport that "prime ministers come and go" and that the trade and constitutional issues affected by the withdrawal agreement "live on".

Read the full story here

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Jacob Rees-Mogg says once the option of no-deal was removed he was willing to consider backing Theresa May's deal.

On the chances of a deal getting through, Mr Rees-Mogg says "a considerable amount depends on the DUP".

He says he will not "abandon the DUP" as they are championing the rights of the Union.

If the DUP abstain or vote against Theresa May's deal, Mr Rees-Mogg says he will back the deal.

Unlike normal votes in the House of Commons, MPs have been given a piece of paper on which they must note their name and how they are voting for each proposal.

Usually, MPs make their votes by physically walking into one of two areas in the Commons.