What this is being described as is a "stable agreement" that was reached by EU and UK negotiators last night.
I’m told it's not right to say that negotiations have concluded, but that the text is as stable as it can be.
After it was stabilised last night, the text was sent on to Downing Street.
One imagines then that Theresa May, the PM, is examining the text. She obviously felt that it wasn’t ready to put to the cabinet formally today - that looks like it might happen perhaps tomorrow or Thursday.
This is a breakthrough of sorts, in that the two teams of negotiators have reached some kind of stable understanding on what this text will mean.
It is going to have one backstop in the withdrawal agreement. That will be a UK-wide customs arrangement, and that’s something that London has been pushing for.
But I’m told that there will be specific provisions that go deeper for Northern Ireland.
These provisions are not just on the regulatory side - that is, how rules apply for the production of goods, industrial goods, agri-foods and so on in Northern Ireland.
These other provisions will be across the board. That means they will also have specific provisions for Northern Ireland in the customs area, but it is seen as one overall backstop.
Of course, this is all broad-brush stuff - we haven’t seen the actual wording of the text yet - but that’s my clear understanding of how it will actually work.