European Commission vice-president Maros Sefcovic said on Tuesday the EU had significant concerns about the announcement by the UK government to enable legislation that would disapply basic elements of the Northern Ireland protocol.
"Unilateral actions are not acceptable," Sefcovic said in a statement.
Sefcovic added that should the UK decide to move ahead with the bill, the EU would need to respond with all measures at its disposal. He also said the potential of the flexibilities proposed by the EU commission had yet to be fully explored, adding: "They can deliver a real difference on the ground."