The cabinet has backed a draft withdrawal agreement between the UK and the EU.
The PM said it had been agreed after a “long, detailed and impassioned debate” in a 5-hour cabinet meeting.
She said it was a “decisive step” and would allow the deal to be finalised in the coming days.
Conservative Brexiteers have already attacked May for what they believe to be in the deal.
May will now have to get Parliament to vote for the deal.
In a letter to other MPs Jacob Rees Mogg unleashed his dissatisfaction with the deal and urged other MPs to vote against it.