But the PM will not say whether the UK will be better off outside, only that it will be “different”.
Theresa May has said the UK will not get a “better deal” from the EU if MPs reject the agreement she has struck.
She told a BBC phone-in that there would be just “more division and uncertainty” if Parliament voted against the agreement next month.
But she declined to say whether the UK would be better off outside the EU, saying only it would be “different”.
A summit of EU leaders to sign off the deal will go ahead on Sunday despite “unresolved” issues over Gibraltar.
Spain has demanded last-minute changes to the agreement, unless it gets assurances over the British Overseas Territory, although no one country can block the withdrawal agreement on its own at this stage.
The PM is taking to the airwaves to make the case for the agreement, which is opposed by Labour and many Tory MPs.