Brexit Antagonism Escalates as EU, U.K. Go Another Round

  • Spat over Northern Ireland most serious in series of disputes
  • Relations beset by wrangling, from financial services to trade

Graffiti on a building reads "No Irish Sea border" in the Sandy Row area in Belfast.

Photographer: Paul Faith/Bloomberg
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When the U.K. and European Union shook hands on a trade deal late last year, few expected the new relationship to be plain sailing. And as with many divorces, antagonism between the sides has refused to fade.

Among the most sensitive issues is Northern Ireland, and tensions ramped up considerably this week when the U.K. announced it will ignore some crucial obligations under the Brexit deal and the EU responded with a dramatic threat of legal action.