UK and EU officials have agreed the draft text of a Brexit agreement in a significant breakthrough for the talks.
A cabinet source told the BBC that the document has been agreed at a technical level by officials from both sides after intensive discussions this week.
A special cabinet meeting will be held at 14:00 GMT on Wednesday as Theresa May seeks ministers’ backing.
The prime minister is currently meeting ministers for one-to-one talks as they are given sight of the draft agreement.
Health Secretary Matt Hancock, Transport Secretary Chris Grayling and Chief Whip Julian Smith are among those who have been seen entering Downing Street.
Scottish Secretary David Mundell said he had yet to see the detail but he was “encouraged” by the progress made.