(CNN) UK Prime Minister Theresa May has called on British lawmakers to "come together" and vote her Brexit deal through, following months of uncertainty and division.

"I am convinced that the time to define ourselves by how we voted in 2016 must now end," May wrote in a Britain's Sunday Telegraph newspaper, referring to the country's referendum on membership of the EU.

"We can only put those old labels aside if we stand together as democrats and patriots, pragmatically making the honourable compromises necessary to heal division and move forward."

In the article, May argued her deal "honours the result of the referendum, addresses the hopes and fears of all sides, and is the very best deal negotiable with the EU."

UK lawmakers are expected to vote on May's Brexit deal for a third time later this week.

She said its rejection by MPs, who have twice voted it down by a massive margin, had opened up "a range of undesirable alternatives," including the risk that the UK could crash out of the EU without a deal.

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