UK and Irish government relations have “improved significantly” in recent weeks, Taoiseach (Irish prime minister) Micheál Martin has said.
He made the comments at the end of the latest British-Irish Council.
On Thursday, he met UK Prime Minister Rishi Sunak for the first time, with both leaders saying a “breakthrough” on the NI Protocol is possible.
Mr Martin said there was a “window of opportunity” but declined to be drawn on how long negotiations could last.
He said the decision to extend the deadline for forming a Stormont executive into 2023, and delaying the legal requirement for an assembly election had been helpful.