Whisper it softly, but UK officials think the economic part of the EU reform package has been sorted tonight in talks between David Cameron and Francois Hollande, the French president.

Subject to technical drafting, of course, but the two leaders apparently looked each other in the eyes and accepted each other's personal undertakings that members of the eurozone won't economically duff up those outside the currency, like us.

And we outies would never prevent euro members acting collectively to protect their vital interests. So that's alright.

Deal time at 4am Friday morning in Brussels then?

Well that's what the choreography looks like, in that all the residual decisions are the bigger political ones.

And there are no more meetings of sherpas, or technocrats, scheduled before the momentous summit of government heads. But that is not to say the whole package is agreed.

First of all, and really importantly, tomorrow Cameron badly needs undertakings from the president of the European Parliament Martin Schulz.

He also needs the backing of leaders of the main European Parliament political groups that they will do their damnedest to legislate the necessary reforms, subject to the political agreement of EU leaders at the end of this week and a subsequent "remain" vote in our referendum.

To be crystal clear, this vital legislation cannot happen till after the referendum.

But our officials believe the parliament can give a pre-commitment to enact the spirit of the deal (which, just so you know, will been seen as wholly worthless by "leave" campaigners).

Second, Poland and other East European countries are not content to nod through the proposed restrictions on benefit payments to migrants.

And there will therefore be a punch up about how much those restrictions would and should be a precedent for all EU members, or just for Sweden, Ireland and the UK (the troika that opened their borders to migrants from new EU members without transition arrangements - and therefore received more migrants faster).

Third Belgium - perhaps the last believer in the dream of the great European superstate, and with Byzantine complex parliamentary arrangements for approving any deal with Britain - doesn't want us exempted from the principle that all EU members are on the eternal path to ever closer union.

And apparently the Portuguese hate the whole reform deal.

Oh and finally the length of the migrant benefit brake, four years or seven, has been left to the 28 panjandrums to fix.

So Cameron has not yet struck that EU bargain which allows him to have the historic emergency cabinet meeting on Friday (which I wrote about earlier today).

Such that the settled position of the government would be we should vote to remain in the EU in a referendum on June 23.

But as I said on News at Ten, I would bet 5 euros we will see that deal because there'll be the normal EU horse trading and the principles of our opponents will be assuaged and purchased.

This is when the fun starts, because it legitimizes a half dozen odd members of the cabinet to try and whack David Cameron's EU settlement into smithereens, as the real action, the referendum debate, kicks off.