EU leaders have used the British Prime Minister's presence at the EU migration summit in Brussels to warn that the lack of progress in Brexit talks between the two sides is threatening to deliver a "no deal" scenario that would crash the UK out of the EU and see it adopt WTO tariffs in trade.
Donald Tusk, the head of the European Council used the summit's press conference to warn that the most fundamental issues between the two sides remain unresolved. In a blunt warning to Mrs. May, he said the current round of negotiations were "the last call to lay the cards on the table."
The EU's Chief Negotiator Michel Barnier in particular singled out the persistent problem of the Northern Irish border, which all sides have said they oppose becoming a hard frontier but have so far failed to agree on how such a situation can be prevented.
Both sides have professed a desire to conclude the negotiations by October of this year, with Theresa May coming under increasing pressure from her party members to allow the Conservative Party and Parliament to take a more active role in the process if sufficient progress is not made by then.