MPs are now voting on Sir Oliver Letwin’s cross-party amendment, which would allow MPs to take control of the parliamentary agenda on Wednesday.

This would allow MPs to put forward business motions relating to Brexit - most likely indicative votes on alternatives to the PM’s deal.

The prime minister said earlier that the government would not commit to delivering the outcome of the votes but would "engage constructively" with MPs.

The Labour frontbench indicates that it will not be pushing its amendment to a vote tonight.

The amendment would have called on ministers to “provide sufficient parliamentary time this week” for indicative votes on Brexit options.

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With the debate finished, MPs will now vote on the selected amendments that are pushed to a vote.

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Image source, HoC

Summing up for the government, Brexit Secretary Stephen Barclay says there are "constitutional implications" of the cross-party amendment that would allow MPs to take control of the Commons timetable on Wednesday.

The plan is "unprecedented in its nature", he says.

Intervening, Sir Oliver Letwin - one of those behind the amendment - asks whether ministers could not just accept the plan contained within it.

Stephen Barclay says ministers have already committed to provide parliamentary time to debate alternative Brexit options and will consult on "how that process should look".

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Image source, HoC

Summing up the debate for Labour, shadow Brexit minister Jenny Chapman calls on MPs to "take the reins from the hands of the prime minister" to provide a way out of the "Brexit impasse".

"There's a void where coherent leadership ought to be", she says. Parliament should "step into the void", she adds.

She says indicative votes are "not ideal", but would allow MPs to express their views in "extraordinary circumstances".

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Image source, HoC

Labour MP Owen Smith says he fears there will be "double dealing" tonight to persuade Tory MPs not to back the cross-party amendment on indicative votes.

He says he fears that later in the debate ministers will make a "nebulous promise" to offer "something similar" to win support.

However, he says "false promises" have been made "countless times".

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Lib Dem leader Sir Vince Cable insists that a series of so-called indicative votes would "have an effect" on the outcome of Brexit, even if they are not legally binding on ministers.

He says that if the idea of a second referendum is defeated in an indicative vote, it would not kill off the argument for it, although it would be "somewhat weaker".

If the PM's deal is defeated again, he says, revoking Article 50 and cancelling Brexit "will then become a serious option".

"But it's not a very democratic option, it would be much much better to have the people deciding the outcome rather than just an arbitrary cutting off of Brexit", he adds.

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Labour MP Lisa Nandy says she doesn't think the government understands how little trust there is left.

Ms Nandy says the government must rule out no-deal in the interests of the country.

She questions what sort of government cannot guarantee access to medicines for its citizens in just a week's time.

"They tell us that the House must make a decision. When we get up and speak with one voice about what we want, they say 'OK we'll go away and think about it'.

"They've driven this country to the brink and are not learning - this is a government that is not serious about safeguarding the welfare of citizens," she concludes.

Amid all the gossip swirling around Westminster, the most important question remains the same - will senior Tory Brexiteers finally come on board?

Conservative MP Sir Oliver Letwin's amendment:

• takes power to control business in the Commons away from the government on Wednesday, to allow MPs to put forward business motions relating to Brexit - most likely indicative votes
• If more than one business motion is submitted, Bercow will decide which one has "precedence"
• Whatever is happening in the Commons on Wednesday will be interrupted at 14:00 GMT. MPs will have one hour to debate the business motion before moving onto the main business

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Image source, HoC

Labour MP and Chair of the Brexit Committee Hilary Benn says he will be supporting the Labour amendment and the Letwin amendment this evening.

Mr Benn says he does not believe Cabinet Office Minister David Lidington's heart was really in the speech he gave earlier.

He adds that indicative votes would allow the broad options to be laid out, and that he will be voting to stay in a customs union and to a confirmatory referendum.

Mr Benn says the word indicative is "really important" as it is about "indicating the direction of travel for the next point of this process".

"MPs must guide the way through," he adds.

Reality Check

The term "indicative votes" has joined the crowded field of Brexit jargon recently. But what does it mean?

Indicative votes are when MPs vote on a series of options designed to test the will of Parliament to see what, if anything, commands a majority.

In the case of Brexit, supporters of indicative votes believe they could provide a way out of the current political deadlock.

Read more.

Laura Kuenssberg
BBC political editor

Influential Brexiteers who attended talks at Chequers with the Prime Minister yesterday met again today.

The group, including Iain Duncan Smith, Steve Baker, Dominic Raab and Boris Johnson are understood to have had further discussions on whether to back the Prime Minister’s deal, including the option of her departure in return for votes.

It’s understood some involved want her to make a public commitment to set a timetable for departure because there is ‘such a problem of trust’.

The group, which some insiders have branded the ‘grand wizards’, are understood not to have reached any final conclusions and are involved in ongoing talks with Brexiteers and Number 10.

One of those present said: ‘There are no firm commitments - the jelly keeps getting nailed to the wall again, then you find it’s fallen on the floor’.