On thorny issues like the Irish border, which is the main obstacle for the two negotiating teams, the new deal offers new measures.

First, Northern Ireland will remain aligned to a limited set of EU rules, particularly related to goods.

"This means that all of the procedures will be taken into account in Northern Ireland and not across the island. For the purpose, UK authorities will be in charge of applying the Union Customs Code in Northern Ireland," Barnier told a press conference.

At the same time, Northern Ireland will remain in Britain's customs territory as an entry point to the EU Single Market. This will be beneficial for Britain's future trade policy, said Barnier.

"UK can apply authoritative UK tariffs on products coming from third countries, so long as those goods reviews entering Northern Ireland are not at risk of reviews entering our Single Market. However, for goods at risk of entering the Single Market, UK authorities will apply the EU's tariffs," said Barnier.

The only remaining open question seems to be VAT regime in Northern Ireland, which, according to the EU, is an important subject to avoid distortion of competition within the Single Market for goods.

According to the website of POLITICO's Europe edition, Britain has asked for Northern Ireland not to be subject to the EU's VAT rules.

It may not seem like much, but it is problematic for the EU. Because if Britain decided to lower its tax rates, there would be problems on ensuring a level playing field, POLITICO noted.

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