The EU's chief negotiator Michel Barnier will demand that EU workers in Britain are given employment rights enforced by the European Commission and overseen by European courts, even if they come to the United Kingdom after the nation has officially left the EU, according to a report by The Financial Times.
May called a snap general election for June 8 in what was a shock and unexpected announcement on Tuesday.
"President Juncker will travel to London at the invitation of Prime Minister May to discuss the process of the Article 50 negotiations between the European Union 27 represented by the commission and the United Kingdom", commission spokeswoman Mina Andreeva told reporters Thursday.
Barack Obama has famously warned Britain would be at the back of the queue for talks if we made a decision to Brexit, while European leaders are looking to stop the government negotiating new deals while leaving the EU.
He said he was optimistic the prime minister would respect all existing rights enjoyed by European citizens because she wanted the same in return for British citizens in the rest of Europe.
The current mood is more promising than when May formally triggered the two-year Brexit process last month, a step that saw both sides taking tough positions on the talks ahead. "This is the most important message".
He said tariffs could not be ruled out but that "this is your decision".
He also invited May to address the Parliament.
He said "uncertainty about the move" was already affecting the agency's work and staff and he urged the European Council to "decide on the EMA's new location as swiftly as possible".
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After a hard start to 2017, Kerber has begun to regain her form and reached a first final of the year in Monterrey last time out. She will miss all the matches in the 2017 season but will probably return to the court next year.
"The good news, from a European point of view, is that she would be less fragile for all the concessions that she is going to have to make", another European diplomatic source said.
A subtle edit has also downplayed the EU's view of how soon it is willing to engage in discussions on an ambitious post-Brexit trade deal with the UK.
Recent opinion polls suggest a clear lead for May's Conservatives over the main opposition Labour Party.
If so the "positive scenario is that she wants that (a majority) so she's not vulnerable to attacks from the eurosceptic right", Tilford told AFP.
Meanwhile, EU's foreign policy chief Federica Mogherini said negotiations with Britain would be hard.
Stressing that there should be no diminution of citizens' rights after Brexit potentially sets a high bar for any reciprocal deal since May is also determined to limit freedom of movement rules enshrined in European Union law.
But Britain should not hope for any favours from the other 27 European Union countries just because May has a stronger mandate, Tilford said.
"Let me tell you that to me all member states are important, equally, because one can be contributing more on some policies than others".