The Taoiseach has urged Prime Minister Boris Johnson to "steady the ship" and pull back from plans to override Brexit's Northern Ireland Protocol.
Micheál Martin said "unilateralism will not work" and would be "deeply damaging" as he urged the UK government to negotiate agreed solutions with the European Union.
He said Brussels would respond "in a calm and in a firm way" if London presses ahead with legislation at Westminster to remove parts of the Irish Sea trade deal.
