The British Prime Minister's plan for a Brexit deal will be delivered to Brussels later.
It'll include a message that there will be no delay beyond the October 31st deadline.
Boris Johnson will tell the Conservative Party Conference in Manchester that it's the last proposal the UK will make.
Reports today in the Daily Telegraph indicate they'll suggest two borders for four years to replace the backstop.
That would be a regulatory border between Britain and the North down the Irish Sea and customs checks on the island of Ireland.
"In the end, a country has to be able to govern its customs," said British Prime Minister Boris Johnson. "If you're going to come out of the EU, you've have got to run your own trade policy, run your own customs.
"So we have to find a way of doing that. I won't deny that this is the tough bit."
Taoiseach Leo Varadkar yesterday dismissed a British proposal reportedly submitted to EU negotiators for customs posts set back from the border.
"The diplomats in Brussels think they will never give this concession because they thing that Boris Johnson will never accept a border down the Irish Sea, or never accept the backstop," said Ian Wishart European politics correspondent with Bloomberg.
"I think it shows the two sides are willing to compromise," continued Mr. Wishart. "And there is a window for a deal if there are major concessions by the British Government."
However, Tanaiste and Minister for Foreign Affairs, Simon Coveney has said, "from what we're reading this morning, I wouldn't be too encouraged by it.
"Essentially, if he is proposing customs checks on the island of Ireland, that wouldn't be the basis for an agreement. But let's wait and see the detail."