Britain's ambassador to the EU, Tim Barrow, also will play a major role, and the Foreign Office will talk to individual member states to try to get them on its side.
The European Commission's Brexit negotiator Michel Barnier has said they must be wrapped up by October 2018 to give the EU and national parliaments time to ratify the deal.
His warning was mirrored in comments made by EU Commission President Jean-Claude Juncker, who said the United Kingdom would have to accept the deal offered or leave with no deal, after Ms May confirmed next Wednesday as the moment Article 50 would be invoked.
Former Prime Minister David Cameron offered voters a referendum on European Union membership, and in June they voted by 52-48 percent to leave. Next Wednesday, the Government will deliver on that decision and formally start the process by triggering Article 50.
According to Brexit secretary, David Davis, the process of exiting the European Union is "the most important negotiation for this country in a generation".
Donald Tusk, the head of the European Council, said that within 48 hours of the triggering of Article 50, he would present draft guidelines to the remaining 27 member states. May spokesman went on: "After we trigger the 27 will agree their guidelines for negotiations and the Commission will deliver their negotiating mandate". Britain believes it can negotiate the exit agreement and a deal on future relations within the two-year negotiating period, although diplomats are sceptical.
The Prime Minister was given the authority to trigger Article 50 last week when the European Union (Notification of Withdrawal) Act received royal assent.
In Northern Ireland, which also voted to stay in the European Union, the largest Irish nationalist party, Sinn Fein, has said it wants a referendum on splitting from the United Kingdom and uniting with the Republic of Ireland "as soon as possible". Following the two-year time frame for withdrawal negotiations, it's expected that Brexit will happen in March 2019. Mr. Davis's comments indeed came just hours after Donald Tusk, the president of the European Council, said that Britain leaving the EU without a trade agreement would be more damaging for the United Kingdom than for the rest of Europe.
Downing Street's announcement of the date - as promised, by the end of March - came after an earlier expected announcement was torpedoed by the declaration of Scotland's First Minister, Nicola Sturgeon, to hold a second referendum on independence.
Mrs May is expected to make a statement to the House of Commons on Wednesday shortly after invoking Article 50, setting out her aims. She has previously said that there could be no "half in, half out" deal and Britain is prepared to withdraw from the European single market - a central tenet of the European Union that guarantees the free movement of goods, capital, services and people - and also the customs union, which guarantees tariff-free trade within Europe.
Sinn Féin leader Mr Adams said Mr Kenny must work to secure special designated status for Northern Ireland within the EU. Brexit Secretary Davis has anyway said that providing forecasts of the repercussions of a no-deal scenario was "impossible" without knowing what mitigation measures could also be put in place.
The SNP's Europe spokesman, Stephen Gethins, said the announcement "shatters beyond fix any notion or position that the Prime Minister is seeking a UK-wide agreement".
On Tuesday President Trump will address House Republicans in advance of their vote on the American Health Care Act (AHCA). He also stressed the importance the Supreme Court plays in the expansion, or retraction of individual rights.
On Sunday, the White House released another late-day account of the president's day, including a call with the president of Chile. And he said Paul Manafort, who ran Trump's campaign for months, "played a very limited role for a very limited amount of time ".
I hate it for the fans. "Hopefully we can spread (the schedule) out a little bit more and get guys a little bit more rest. On the night, the four-time MVP was 13-for-22 from the floor, adding a team-high seven assists, six boards and a steal.
On Wednesday, Duterte will hold a roundtable discussion with business executives and meet the Filipino community in Bangkok. Duterte will visit Thailand today as the Philippines prepares for its chairmanship of this year's ASEAN summit.
Instead, the favorite was forced to fight for their lives against an underseeded team who can beat anyone in a one-game scenario. The Wildcats have a Naismith candidate in Josh Hart , a late-game assassin in Kris Jenkins and a top-five coach in Jay Wright.
Brian Fitzpatrick, R-Pa., said he couldn't vote for the bill, stressing a need "to take our time and to get this right". The GOP plan promotes health savings accounts for the affluent and encourages catastrophic insurance deductibles.
Last year, Warren's paltry $1.7 billion ranked him 32nd in Texas and 1067th among the world's billionaires, according to Forbes . Trump hasn't released his tax returns, but during the election campaign he claimed to be worth in excess of $ 10 billion .
The Navy crew arrived at 4:30 a.m. and began removing water from the fishing vessel, then turned the task over to the Sockeye . Truline made it to the Newport Beach (Calif.) Shipyard hours later. "We were able to keep up with the flooding", Simpson said.
In recent years, senators have sat at their desks during a Supreme Court vote and stood one by one to cast their votes. It's unclear whether Republicans will have those votes, meaning Democrats have the ability to block the nomination.
Bill Gates again tops Forbes rich list; Trump slips 220 spots
Forbes said about 40 per cent of the president's fortune is linked to Trump Tower and other Trump-owned properties near to it. Donald Trump is $1 billion poorer since becoming president, according to Forbes latest list of the world's billionaires .
Uttar Pradesh gets Hindu firebrand leader
Given his following among a large section of Hindus as the "saviour" of the religion, Yogi would suit the RSS more than Modi. The party is back in the state after 15-years by winning 312 seats in the recently held assembly elections.
Trump, critic of Obama's golfing, regularly hits the links
Britain is said to be ready to forget the spat after the United States agreed not to repeat claims GCHQ wiretapped Mr Trump. Among his other playing partners have been company executives and pro golfers like Rory McIlroy, Tiger Woods and Ernie Els.