Sinn Fein President Mary Lou McDonald said her party had a "fairly tough" meeting with British Prime Minister Boris Johnson on Monday in which they told him taking unilateral action over post-Brexit trade rules for Northern Ireland would be wrong, APA reports citing Reuters.
Johnson says the European Union must make concessions on the rules - known as the Northern Ireland protocol - to win over the province's unionist community loyal to the United Kingdom, and has threatened unilateral action that the EU says could start a trade war.
McDonald, whose party seeks a united Ireland and is now the region's largest after an election this month, said Johnson did not give details of any proposed legislation which would effectively ditch parts of the protocol.
"We've had what we would describe as a fairly tough meeting with the prime minister," McDonald told reporters following the talks with Johnson in Northern Ireland.
"We have said directly to him that the proposed unilateral act of legislating at Westminster is wrong. It seems to us absolutely extraordinary that the British government would propose to legislate to break the law."