There is no plan B if this Brexit deal fails.
That's according to the Taoiseach Leo Varadkar, who was speaking after the EU and UK agreed to the Brexit withdrawal text.
EU leaders have described it as 'a sad day' - while also warning that this deal is the only one on the table.
Mr Varadkar has said there won't be the radically different deal that some Brexiteers say is possible.
The Taoiseach added that there isn't a fallback plan should this agreement fail to pass in the House of Commons.
"Well there isn't a plan B.
"The truth is what we have here is the best deal that's available, both for the United Kingdom and for the European Union.
"We have backstop in place - and we all agree that the United Kingdom, after it leaves, will be more than a third country given the fact that it has had such a close relationship with the European Union that it is a member and will be the only former member".
President of the European Council Donald Tusk | Image: © European Union
European Council President Donald Tusk restated the European Council's position on the future relationship.
"The European Council approved the political declaration setting out the framework for the future relationship between the European Union and the United Kingdom of Great Britain and Northern Ireland.
"The European Council restated the union's determination to have as close as possible a partnership with the United Kingdom in the future.
"I quote this passage of today's conclusions, as it contains the essence of our meeting: Ahead of us is the difficult process of ratification, as well as further negotiations.
"But regardless of how it will all end, one thing is certain - we will remain friends until the end of days, and one day longer".
President of the European Commission Jean-Claude Juncker speaks following a special meeting of the European Council in Brussels | Image: © European Union
While European Commission President Jean-Claude Juncker added: "This is the best deal possible for Britain, this is the best deal possible for Europe, this is the only deal possible - the only deal possible".