British Prime Minister Teresa Mae said the House of Commons was facing a "decisive choice" next week on whether they would support its exit agreement from the European Union (BRICCAST), warning that if they refused to agree, "Britain may never go out".
"We will support him and the UK will leave the European Union, reject him and no one will know what will happen. We may not leave the EU for many months, and we may leave it without the protection that the agreement will provide," May said in a speech in Grimsby, east England.
"Delaying exit may create new problems. It could mean our inability to end freedom of movement, our inability to conclude our trade agreement, and the lack of regaining control. This is what the British people voted for. The postponement of something else - a referendum else".
She explained that if the deputies rejected the agreement there is nothing, stressing that it would be "a moment of crisis," as it has already told European leaders that the negotiations need to "another push."
British MPs vote on May's agreement with Brussels, which could include new elements after a next round of negotiations this weekend.
If a vote is lost on Tuesday, deputies will vote on Wednesday to leave the EU without a deal. If deputies refuse to go out without an agreement, they will vote on Thursday to ask the union to extend the deadline.