European Union officials were hoping Tuesday that after more than three years of false starts and sudden reversals a Brexit deal with Britain might be sketched out within hours.
The bloc said that it might be possible to strike a divorce deal by Thursday's EU leaders' summit, which comes just two weeks before the U.K's scheduled departure date of Oct. 31. One major proviso: The British government must make more compromises to seal an agreement in the coming hours.
Britain and the EU have been here before within sight of a deal only to see it dashed but a surge in the British pound Tuesday indicated hope that this time could be different. The currency rose against the dollar to its highest level in months.
Even though many questions remain, diplomats made it clear that both sides were within touching distance of a deal for the first time since a U.K. withdrawal plan fell apart in the British House of Commons in March.
Martin Schirdewan, a German member of the European Parliament's Brexit Steering Group, said an agreement is "now within our grasp" following a breakthrough in negotiations.
This week's EU leaders' meeting the last scheduled summit before the Brexit deadline was long considered the last opportunity to approve a divorce agreement. British Prime Minister Boris Johnson insists his country will leave at the end of the month with or without an agreement, although UK lawmakers are determined to push for another delay rather than risk a chaotic no-deal Brexit.
Michel Barnier, the EU's chief Brexit negotiator, said at a meeting of the bloc's ministers in Luxembourg on Tuesday that the main challenge now is to turn the new British proposals on the complex Irish border issue into something legally binding.
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EU member Ireland has a land border with the UK's Northern Ireland, and both want to keep goods and people flowing freely across the currently invisible frontier.
A frictionless border underpins both the local economy and the 1998 peace accord that ended decades of Catholic-Protestant violence in Northern Ireland. But once Britain exits, that border will turn into an external EU frontier that the bloc wants to keep secure.
Barnier wants a clear answer by Wednesday morning, so EU capitals can prepare for the bloc's two-day summit that begins Thursday. "It is still possible this week," said Barnier.
The big question is how far Johnson's government is prepared to budge on its insistence that the U.K., including Northern Ireland, must leave the European Union's customs union something that would require checks on goods passing between the U.K. and the EU, including on the island of Ireland.
The British government has given away little detail of the proposals it has made on the issue; even government ministers have not been told specifics. In broad terms, the U.K. is proposing that Northern Ireland but not the rest of the U.K. continue to follow EU customs rules and tariffs after Brexit in order to remove the need for border checks.
But that sounds like a customs union in all but name and would mean new checks or tariffs on some goods moving between Northern Ireland and the rest of the U.K.
An EU official said Barnier told a teleconference of some lawmakers that the Irish Sea would largely become the customs border between the EU and the UK. That would avoid having a visible land border on the island of Ireland between the two. The official spoke on condition of anonymity because the negotiations were ongoing.
But Northern Ireland's Democratic Unionist Party, the party that props up Johnson's minority government, strongly opposes any measures that could loosen the bonds between Northern Ireland and the rest of the U.K.
After DUP leaders met with Johnson late Tuesday at the prime minister's office, the party said negotiations continued but "it would be fair to indicate gaps remain and further work is required." Brexit supporters are also wary that maintaining any kind of customs union with the EU will tie the U.K. to the bloc's regulations and limit its ability to strike new trade deals around the world undermining what were supposed to be some of the key benefits of a withdrawal.
The customs proposals on the table also appear similar to those put forward by former Prime Minister Theresa May. Opposition from pro-Brexit lawmakers, including Johnson, led to those being rejected by Parliament three times.
In public, Johnson has not changed his tune. But the British leader was working hard behind the scenes to secure a deal that would allow him to fulfil his vow to take the U.K. out of the bloc. And some of the staunchest Brexit-backers appeared willing to give him a chance.
"I am optimistic that it is possible for us to reach a tolerable deal that I will be able to vote for," said pro-Brexit Conservative lawmaker Steve Baker.
On Tuesday, Johnson called French President Emmanuel Macron one of the EU leaders most skeptical about Britain's intentions to discuss where elements of a compromise could be found. Johnson's spokesman, James Slack, called the conversation "constructive."
Irish Foreign Minister Simon Coveney, who had a long, intense talk with Barnier early Tuesday, said the EU believes a deal "is difficult, but it is doable."