Officials from Dublin and Westminster will work together on efforts to avoid a hard border between the UK and Ireland after Brexit, Leo Varadkar said.
The Irish prime minister said a comprehensive free trade and customs deal between the UK and European Union was the best way of avoiding problems at the frontier.
Following talks with Theresa May in Belfast, Mr Varadkar said both governments agreed that was the best approach and officials would “explore solutions” to the issue over the coming weeks and months.
But Mr Varadkar and Mrs May said both the UK and Irish governments were working on “option A” – for the issue to be resolved as part of the overall Brexit deal.
He said: “What we agreed to do is co-operate at official level, the two governments exploring together how we can realise the commitments and guarantees that were given in December that a hard border between Northern Ireland and Ireland would be avoided.
“We have always said, and this is where the British and Irish governments are very much agreed, that the best way to achieve that is in the context of a new relationship between the UK and EU.
“So we are going to talk about that, but obviously any negotiations will have to be done through the Barnier task force and the EU27.”
Mr Varadkar said the “tricky part” of the December agreement was going to be how to avoid the hard border.
“It’s very much our view that needs to be stitched into the withdrawal agreement, the legal text of that agreement which is now being negotiated so that’s very much on track,” he said.
“It’s also very much the view of both the British government and the Irish government, affirmed here today, that the best solution is not the backstop – as I call it – or the last resort – as Theresa May the Prime Minister calls it – but actually the option A, ensuring that we can have a new relationship between the UK and EU that involves a comprehensive free trade agreement and customs arrangement that allows us to avoid not just a hard border north and south but also new barriers to trade east and west.”