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It has been a confusing day, with reports and counter-reports flying around.

But here is what has actually happened:

• UK and EU negotiators continued talks to try to get the text of a deal ready to be signed off by EU leaders at Thursday's summit
• EU chief negotiator Michel Barnier updated the bloc on the state of negotiations
• PM Boris Johnson held meetings with his cabinet and backbench MPs and likened the negotiations to climbing Everest, saying the summit was "not far" but still surrounded by "cloud"
• Downing Street also held meetings with the DUP, whose support will be key to getting a deal agreed in Parliament
• Irish PM Leo Varadkar said a "pathway" to a deal was possible but added that there were "issues yet to be resolved

• But a government source this evening told the BBC there would not be a deal tonight
• Meanwhile, Brexit Secretary Stephen Barclay told MPs Mr Johnson "will comply with the law" regarding the terms of any further extension

Image source, AFP

Ahead of the EU summit beginning in Brussels tomorrow, we still haven't seen Donald Tusk's official letter to European leaders setting out the agenda in greater detail.

This official invitation from the European Council president is something of a procedural formality, but can also provide an overview of the major issues to be discussed.

His letter before an EU summit in April at which former PM Theresa May asked for a Brexit delay was widely cited in the media, with a number of quotable lines.

Most memorable was his comment that "neither side should be allowed to feel humiliated at any stage in this difficult process".

Nick Eardley
BBC political correspondent

Conservative Brexiteers want to believe Boris Johnson - they trust him, but they have not seen the legal text of a deal so they are not saying definitively ’yes, we will vote for it.’

The most important players are the DUP.

We think they are seeing the PM again tonight.

Those conversations could be crucial.

If the DUP fall into line then it seems that Boris Johnson would have the numbers to get over the line.

But if they don't, it is very hard to see how he could do it.

The EU's chief Brexit negotiator Michel Barnier has left the EU Council building after briefing EU ambassadors on the Brexit negotiations.

The BBC's Gavin Lee asked him if there was a “deal or no deal?”

Mr Barnier responded: “We are working, we are working.”

Steve Baker, who chairs the ERG group of pro-Brexit Tory MPs, says he "hopes" the group "will be with the prime minister", but there are "thousands of people out there counting on us not to let them down".

Speaking to reporters as he left talks in Downing Street, Mr Baker said the group had explained its concerns in "minute detail", and "great progress" had been made in discussions with No 10.

"We are just really wishing the prime minister well and hoping he has total success.

"We know there will be compromises, but we will be looking at this deal in minute detail with a view to supporting it but until we see that text, we can't say".

The BBC's Adam Fleming says technical talks between the UK and EU negotiating teams are continuing tonight at the European Commission.

Image source, Getty Images

The UK government has been focused on trying to get the text of a deal ready tonight allowing EU leaders to sign off on the deal before tomorrow's summit in Brussels.

Why does this matter?

Because under legislation passed by MPs last month - the Benn Act - Mr Johnson is compelled to ask the EU for a delay to Brexit if he does not get a new deal approved by MPs by Saturday.

Katya Adler
Europe Editor

The expectation on the EU side is that a new Brexit deal text is pretty much ready.

They are now just waiting to hear from the UK side whether it can be signed off.

Even if this text is ready, though, even if it can be signed off by EU leaders, the EU will not yet be breathing a sigh of relief because they have been here before.

Theresa May signed a Brexit deal with the EU and it went on to be rejected multiple times by House of Commons.

The fear is, if a new Brexit text meets the same fate, the government will come back to Brussels asking for more concessions.

Laura Kuenssberg
BBC political editor

As I understand it, most of the issues between the UK, the EU and Ireland have pretty much been resolved.

But it is still not clear whether the DUP are actually on board.

Like other factions in this drama, they have been in and out of Downing Street - recipients of a charm offensive by Boris Johnson's team.

Unless and until they decide it is worth their while to come on board, then it is just too soon to definitively say this is going to be a moment.

It may well be that later tonight this all snaps into place before European leaders gather in Brussels, and then, maybe, they'll give this a rubber stamp.

But the DUP are not a group of politicians who are a pushover.

And this is still something that is simply not yet in the bag.

Image source, Reuters

Speaking at a press conference with German Chancellor Angela Merkel, French President Emmanuel Macron says he wants to believe "the agreement is being finalised" and expresses the hope a deal can be signed off on Tuesday.