Unionist concerns about the peace process are expected to be discussed later today at a meeting of the Forum for Peace and Reconciliation in Dublin.
In advance of the meeting, Sinn Fein and the SDLP have both appealed to unionist leaders to commit themselves to the Good Friday Agreement.
The SDLP said unionists should end their constant threats to collapse the political institutions set up under the Agreement, while Sinn Fein said voters will be demotivated if both the UUP and the DUP contest this May's Assembly election on an anti-Agreement ticket.
In a speech in London yesterday, DUP deputy leader Peter Robinson signalled his party's intention to re-negotiate the Agreement to secure a better deal for unionists.
However, he also acknowledged that the days of unionist domination are over and that nationalists cannot be excluded from government.