Democratic Unionist Party member Sammy Wilson has stated that the party would vote against Prime Minister Theresa May's Brexit deal unless changes are made.
"We would certainly not vote to topple the government because we would have no reason to do so," Sammy Wilson told BBC radio.
But Wilson stated that the DUP reserved the right to withdraw support for the government at a future date.
The same approach has been shown by Deputy Leader Nigel Dodds who stated that the backstop arrangement on the Northern Irish issue within the current Brexit agreement was unacceptable for the UK parties.
Earlier on 5 December, the UK government published legal advice on the Brexit agreement saying that Northern Ireland would remain in the EU Customs Union under the backstop solution for the Irish border.
