May's cabinet is divided between ministers who want the government to embrace a no-deal outcome and those who favour parliament having a final say in a series of votes on potential scenarios for Brexit.
She said: "I can confirm we will return to the meaningful vote debate in the week beginning 7 January and hold the vote the following week".
Some 3,500 troops will be on standby to help deal with any disruptions, ranging from emergency engineering work to shortage of supplies such as medicines.
Deal: Theresa May has been accused of "psychological warfare".
They agreed that businesses should activate their own "no deal" contingency plans as they think appropriate.
It will also distribute 100-page information packs on Friday.
Consumers are being advised to familiarise themselves with advice published this summer, in areas ranging from booking flights to using credit cards, with more details promised in the coming weeks.
About 10 percent of the force would be reservists who will receive their call up papers in the middle of January so that if needed they would be ready in March.
Adding that Britain will have a positive future post-Brexit if it gets a deal, she said "we have to put politics aside" and talk across the House to build a consensus, putting "country before politics". The EU, in its no-deal plans, urged member states to extend the same right to more than 1 million resident British nationals.
"At my first Cabinet earlier this week, I asked all my Ministers to step up engagement with our partners in Wales as we move into the New Year".
"I've become the largest buyer of fridges in the world, I didn't expect that", he told the BBC's Newsnight programme.
With Labour and the SNP also likely to reject her deal, it is unlikely the agreement will get through parliament as it stands.
Huawei announces small increase in new 5G customer base from last month
Meng to the United States and into the hands of USA authorities", Amanda DeBusk of the global trade law firm Dechert told CNBC. The latest case doesn't seem to fit the pattern of the previous two, and Trudeau said he favors de-escalating the tensions.
Prime Minister Theresa May postponed a vote on the deal last week to avert heavy defeat.
The leader of the opposition Labour Party sought to turn up the pressure by lodging a motion of no confidence in May for not quickly re-scheduling the vote by MPs on her Brexit plan that she delayed last week.
However there have been calls for other parties, including the SNP, the Liberal Democrats, Plaid Cymru and the Greens, for Mr Corbyn to push for a no-confidence vote against the government as a whole.
A government source said Downing Street would not allow time in parliament for "a stunt" and if Labour was serious it should attempt a full vote of no confidence in the government, which would bring it down if backed by parliament.
"The leader of the opposition is letting the Government off the hook".
May, who survived a no-confidence challenge from her own backbenchers, had returned to Brussels last week in a bid to secure concessions, but European Union leaders did not budge.
With the European Union unlikely to offer concessions that would win over MPs, more politicians are backing a second referendum, something some of May's ministers say could be avoided if the government tested Brexit scenarios in parliamentary votes.
No date was immediately set for the confidence vote.
Mrs Leadsom told Today: "It's not Government policy".
Finance minister Philip Hammond insisted in a statement Tuesday that "the PM's deal is the only way to deliver on the referendum while protecting jobs, businesses and prosperity".
Fears of a no-deal departure have been heightened by widespread parliamentary opposition to May's EU withdrawal plan, brokered after months of arduous negotiations with her European counterparts.
"The lack of progress in Westminster means that the risk of a no-deal Brexit is rising".