The fate of the Northern Ireland peace process is in Mr Tony Blair's hands, Sinn Féin said today.
Ulster Unionist Mr David Trimble has threatened to push the Good Friday Agreement into crisis by resigning as First Minister if decommissioning is not delivered by the end of the month.
But Sinn Féin vice-president Mr Pat Doherty, the newly elected MP for West Tyrone, said the Prime Minister alone had the power to implement the agreement because of his renewed mandate.
Ms Michelle Gildernew, who won Fermanagh and South Tyrone last week, accused Mr Trimble of operating "an apartheid Executive" by saying Sinn Féin ministers Mr Martin McGuinness and Ms Bairbre de Brún were unfit to attend the Executive.
The Sinn Fein MPs were making their first appearance at Westminster to lobby the Government for use of House of Commons facilities, although they refuse to swear the traditional oath of allegiance to the Queen or sit in parliament.
Mr Doherty said his party, which now has four Westminster seats, had emerged as the "major voice of republicanism and nationalism in the North and the major voice for neutrality in the South."
In Stormont today Mr McGuinness also criticised Mr Trimble, saying he needed to stand up the "rejectionists in unionism instead of attacking republicans in favour of the Good Friday agreement".
Speaking before the first Cabinet meeting of theexecutive since the North's general and local government elections, Mr McGuinness claimed opponents of the agreement in the UUP did not want even moderate nationalists in the SDLP to be sharing power with them.
"It's very clear what they are saying. It's very clear what [former West Tyrone MP] Willie Thompson was saying, what [former East Derry MP] Willie Ross was saying, and Jeffrey Donaldson, who is slightly more clever, and what they are effectively saying, that they don't want a Fenian to govern them - not just the Sinn Fé:in variety . . . They don't even want the SDLP to govern them. They believe it should be majority rule."
PA