If London and Brussels don’t reach a deal by October, the U.K. will be ready to accept this and “move on,” Prime Minister Boris Johnson is set to say Monday.

The two sides aim to agree a deal on trade and future relations by the time of an October 15 meeting of EU leaders so that the agreement can be ready by the time the Brexit transition period expires at the end of the year.

“If we can’t agree by then, then I do not see that there will be a free-trade agreement between us, and we should both accept that and move on,” Johnson will say Monday, according to a statement released to the press ahead of this week’s round of negotiations, which begins Tuesday in London.

“We will then have a trading arrangement with the EU like Australia’s,” Johnson added. “I want to be absolutely clear that, as we have said right from the start, that would be a good outcome for the U.K. As a government we are preparing, at our borders and at our ports, to be ready for it.”