DUP MP Ian Paisley has said he will vote against the Government on the first Commons vote on the new post-Brexit deal on trading arrangements for Northern Ireland - known as the Windsor Framework.
MPs will vote on secondary legislation this week that would give effect to the "Stormont brake" mechanism within the framework.
The brake would allow a minority of MLAs at Stormont to formally flag concerns about the imposition of new EU laws in Northern Ireland - a move that could see the UK government veto their introduction in the region.