The British government has reiterated that there can be no deal with republicans on the restoration of power-sharing in Northern Ireland unless there is a complete end to all criminal and paramilitary activity.
The Taoiseach, Bertie Ahern, is expected to meet British Prime Minister Tony Blair at Downing Street on Tuesday 1 February.
It will be their first full round of talks on Northern Ireland since the Northern Bank robbery before Christmas, which the PSNI has blamed on the IRA.
The Taoiseach will meet Sinn Féin leader Gerry Adams tomorrow, and Mr Adams has also been invited to Mr Blair's country retreat at Chequers later this week.
As well as meeting the Sinn Féin leadership tomorrow, Mr Ahern will also hold talks with SDLP and Ulster Unionist delegations.
The Ulster Unionists leader, David Trimble, said yesterday afternoon that he wanted the two governments to make it clear to Sinn Féin, both publicly and privately, that there would no longer be any tolerance of criminality.
Mr Trimble said his party had some new proposals on how to find a way out of the current political crisis and he would be discussing his ideas with Mr Ahern.
Tánaiste wants SF TDs questioned
Earlier, the Tánaiste said all Sinn Féin TDs in Leinster House should now be questioned on their view of the criminal acts carried out by the Provisional IRA.
Speaking in Limerick this morning, Mary Harney criticised the Dublin MEP, Mary Lou McDonald, for not saying that the shooting of Jerry McCabe was a crime.
She also said all Sinn Féin TDs should now be asked if Mr McCabe's shooting was a crime and if the killing of Jean McConville by the IRA was a crime.
