Brussels: The European Union said Wednesday that Britain's "unilateral action" on trade rules will breach international law and is threatening legal action as post-Brexit tensions continue to escalate between the two sides.
Commission vice-president Maroš Šefcovic said in a statement that UK's decision to unilaterally extend a grace period on checks for goods moving between Great Britain and Northern Ireland amounts to "a violation" of the so-called Northern Ireland Protocol.
The Protocol was designed to ensure an open border between Northern Ireland and the Irish Republic after Brexit.
"This is the second time that the UK government is set to breach international law," Šefcovic said. "This also constitutes a clear departure from the constructive approach that has prevailed up until now."
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The EU's anger was sparked by the British government's decision to extend until October a grace period for checks on agri-food entering Northern Ireland that was set to expire at the end of the month.
In September last year, the UK had already upset the 27-nation bloc when it considered — then backpedaled — legislation that would have given the Boris Johnson's government the power to override part of the Brexit withdrawal agreement relating to Northern Ireland.