Theresa May will set out her five tests for a successful Brexit as she warns the EU that relations will "break down" unless it respects the wishes of the British people.
In a long-awaited speech in London, the Prime Minister will tell Brussels that the Brexit result was a decision to "take back control of our borders, laws and money".
She will say that the new agreement must be built to "endure" or the UK and the EU will have to go "back to the negotiating table" to hammer out new terms after Brexit.
Mrs May will also make clear that the UK and the EU will initially start with the "same rules and laws" after Brexit but then diverge over time under "two separate legal systems".
Speaking at Mansion...