Published Thursday, 04 October 2012
David McNarry, who has already left the UUP, is now set to join UKIP. (© UTV)
A formal announcement is expected to be made by the United Kingdom Independence Party on Friday morning at Stormont.
Mr McNarry, who represents the Strangford constituency, had previously ruled out a move to join the DUP when he spoke to UTV about his row with the UUP back in May.
The veteran politician admitted he had been hurt by then UUP leader Tom Elliott's handling of accusations he revealed details of secret talks between Northern Ireland's two biggest unionist parties to the media.
Those accusations saw him demoted from his post as deputy chair of the education committee - a move which promoted his resignation from the party's Stormont group.
"My future is to continue what I am good at and that is helping people," Mr McNarry told UTV at the time.
Political Editor Ken Reid said a move to the DUP would always have been unlikely anyway.
"But also, UKIP have to be taken seriously," he added.
"They have 11 seats in the European Parliament. In the recent opinion poll in London, talking about the next Westminster election, they were actually above the Lib Dems.
"And I know that the Conservatives in particular are very concerned about their rise."
David McNary will be UKIP's second elected representative in Northern Ireland, joining Newry and Mourne councillor Henry Reilly.