Unionists will today call on Taoiseach Bertie Ahern to scrap any plans to award Dáil speaking rights to Sinn Fein MPs.
Ulster Unionist Party leader Sir Reg Empey is leading a delegation to meet Mr Ahern for talks in Dublin this afternoon.
The Taoiseach has already written to party leaders about a proposal to allow Northern Ireland's 18 MPs take part in a Oireachtas Committee to debate peace process issues. Fine Gael and Labour have already signalled their opposition to any such concessions.
Sir Reg told UUP colleagues at the weekend that Mr Ahern should not try to meet every Sinn Fein demand, and called on him to scrap the prospect of Dáil speaking rights.
However, the UUP has welcomed Mr Ahern's comments during last week's one-day visit to Northern Ireland that the constitutional question between Republic and Northern Ireland had been resolved.
Today's talks are also likely to focus on loyalist paramilitaries and Mr Ahern's expressed wish that power-sharing should be up and running in Northern Ireland by the end of 2006.