The Democratic Unionist Party has said it will be "unable to support" the Brexit deal reacted between Boris Johnson's British government and European negotiators.
In a statement released at lunchtime, the party reiterated its earlier statement opposing the deal, setting up a crucial sitting of the House of Commons on Saturday where the deal must be endorsed.
It makes it more difficult for Mr Johnson to get the deal passed in parliament where the Tory government has a minority government that has relied on DUP support.
"Following confirmation from the Prime Minister that he believes he has secured a 'great new deal' with the European Union the Democratic Unionist Party will be unable to support these proposals in Parliament," the party said in a statement on Thursday at lunchtime.
The statement continues: “The Democratic Unionist Party has worked since the referendum result to secure a negotiated deal as we leave the European Union. We have been consistent that we will only ever consider supporting arrangements that are in Northern Ireland’s long-term economic and constitutional interests and protect the integrity of the Union.
"These proposals are not, in our view, beneficial to the economic well-being of Northern Ireland and they undermine the integrity of the Union. Our main route of trade on an East -West basis will be subject to rules of the European Union Customs Union, notwithstanding that Northern Ireland will remain part of the UK Customs territory.
"All goods would be subject to a customs check regime regardless of their final destination. The default position, even for goods travelling from one part of our country to another, is that they are considered under the EU Customs code unless otherwise agreed. We recognise that only those goods ultimately destined for the Republic of Ireland would be subject to tariffs but the reality remains that the EU would have a veto on which goods would be exempt and which would not under the Joint Committee arrangements. This is not acceptable within the internal borders of the United Kingdom.
“Consumers in Northern Ireland would face the prospect of increased costs, and potentially less choice due to checks being implemented in order to facilitate the European Union. Throughout all the discussions on these issues we have been clear that Northern Ireland should not be subjected to administrative burdens which will be entrenched for the future.
“On VAT Northern Ireland will again be bound into arrangements that the rest of the United Kingdom will not. There is a real danger that over time Northern Ireland will start to diverge across VAT and Customs and without broad support from the democratic representatives of the people of Northern Ireland.
“While some progress has been made in recognising the issue of consent, the elected representatives of Northern Ireland will have no say on whether Northern Ireland should enter these arrangements.
"The Government has departed from the principle that these arrangements must be subject to the consent of both unionists and nationalists in Northern Ireland. These arrangements would be subject to a rolling review but again the principles of the Belfast Agreement on consent have been abandoned in favour of majority rule on this single issue alone.
“These arrangements will become the settled position in these areas for Northern Ireland. This drives a coach and horses through the professed sanctity of the Belfast Agreement.
“For all of these reasons it is our view that these arrangements would not be in Northern Ireland’s long term interests. Saturday’s vote in Parliament on the proposals will only be the start of a long process to get any Withdrawal Agreement Bill through the House of Commons.”
