Nesbitt has said that the revelations about the Provisional IRA have shattered trust in Sinn Fein and the UUP
can no longer work in coalition with the republican party.
walking out of the Executive has no impact on the continuance of devolution and has even less impact on Sinn Fein.
The move will heap further pressure on the linkup which has already cost the UUP
its only MP Lady Sylvia Hermon and North Down MLA Alan McFarland.
claimed the ministerial Executive must sort out other outstanding matters - such as the longstanding row over post-primary school transfer arrangements - before it can take on law and order functions.
spokesman Dermot Nesbitt welcomed the defections, saying the party would now be able to ``unite''.
Mr Trimble's leadership of the UUP
has been called in question since the party's losses in the Westminster and local government elections.
With no other sensible rationale, the UUP
has resorted to one attack after another on the DUP proving that this is nothing more than a selfish party political stunt.
The Taoiseach said the UUP
remained a significant player in Northern Ireland politics.
PETER Weir, 32, is a founding member of Union First, a pressure group within the UUP
which has major reservations over the Good Friday Agreement.
There is widespread concern among Unionists that UUP
leader David Trimble will form an executive with Sinn Fein ahead of IRA decommissioning, it was claimed last night.
leader David Trimble said there was still "deep scepticism" among some of his members about the commitment to peace of parties with links to paramilitary groups.
THE DUP accused the UUP
of hypocrisy and noted the party sat in an Executive with Sinn Fein before IRA decommissioning.