Sinn Féin leader Mary Lou McDonald has called for "credible" political talks to restore power-sharing in Northern Ireland.
Ms McDonald said the talks collapsed in February after the Democratic Unionist Party (DUP) leadership "walked away from the deal that they had agreed".
Negotiations between Sinn Féin and the DUP, aimed at resurrecting devolved government at Stormont, ended without agreement in February.
It is now more than 590 days since there was a fully functioning Assembly.
Last week, Northern Ireland surpassed a record set by Belgium for the longest period without an operational government in peacetime.
Ms McDonald told a meeting of elected representatives in Co Cavan that the issues that led to the failure of the talks had not gone away.
She said: "Rights and respect are not orange or green issues.
"The rights afforded to citizens in the rest of Ireland and in Britain should be recognised in the north.
"The right to marriage equality, to healthcare for women, to the protections of a language act and to access to an inquest."
Ms McDonald said the solution to the impasse was clear, and that a "real power-sharing partnership" needed to be entered into.
"The do-nothing British Government have supported the undermining of their own agreements and the rights of citizens," she said.
Ms McDonald leader said she welcomed that the two governments were planning for a further round of talks to be held in the autumn.
"We are up for talks and agreement, but any talks must be credible," she said.
"We cannot have talks for the sake of talking. It must be about delivery."
DUP deputy leader Nigel Dodds said local decision-making had come to a standstill and public services were undermined.
"We have spent the summer engaging with the Government, stressing the need for decisions to be taken.
"People are tired of uncertainty. It is clear that decisions will now be made at Westminster.
"With Parliament returning this week, the Government will be required to live up to their commitments to ensure the good governance of Northern Ireland."
He added: "The people of Northern Ireland deserve better and we will ensure that Westminster acts in their best interest."
