Just two days before Thursday's breakthrough, Johnson's advisors said that brokering a compromise was "essentially impossible" following a hard meeting with German Chancellor Angela Merkel. "You need vigilance, determination and patience", following his meeting with the UK's Brexit Secretary Stephen Barclay.
The European Union and Britain will step up Brexit discussions over the coming days, following a breakthrough in talks between top EU and United Kingdom negotiators on Friday.
Now Irish media are suggesting that the "pathway to a possible deal" most likely involves concessions from Mr Johnson with regards to the border, and that the UK/EU border will instead be in the Irish Sea, between Ireland and the UK, instead of on the island between Northern Ireland and the Republic. "I have received promising signals from the taoiseach that a deal is still possible", Mr Tusk said, during a trip to Cyprus.
Meanwhile, Barclay also reiterated that he "had a constructive meeting with Barnier this morning".
"Of course there is no guarantee of success and the time is practically up but even the slightest chance must be used".
It followed an apparent breakthrough in talks on Thursday between Boris Johnson and his Irish counterpart Leo Varadkar at a country house retreat on the Wirral.
Sterling rose sharply on global money markets in the wake of the talks, on which Cabinet received a briefing on Friday morning. While there's no discussion yet of putting a time limit on that arrangement, something the European Union has previously rejected, one European Union official said that it could yet be considered.
Briefings by anonymous Downing Street sources had accused Mr Varadkar of backtracking on previous commitments to try to find a deal, and of refusing to negotiate.
And following a heated telephone call between Mr Johnson and German Chancellor Angela Merkel on Tuesday, Number 10 sources claimed the European Union was making it "essentially impossible" for Britain to leave with a deal.
Johnson has until October 19 to secure a deal with the European Union, otherwise he will be instructed - as set out by United Kingdom law - to request a delay to Brexit from Brussels passed the current deadline day - October 31.
The PM has said that, while he will abide by the law, he is determined to leave on the Halloween deadline of October 31 come what may.
The prime minister put forward revised proposals for a deal last week, created to avoid a hard border on the island of Ireland after Brexit.
He is preparing to hold a vote on his deal on the "Super Saturday" parliament sitting as he seeks MPs to either endorse his approach or force through a Brexit delay, the paper says.
Labour will take action in the courts to prevent Boris Johnson from pushing through a no-deal Brexit against the will of parliament, Keir Starmer has pledged.
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