A delegation of Sinn Fein MPs is to travel to London for a series of meetings with the Secretary of State James Brokenshire, other political parties and trade unions.
Paul Maskey said his party’s MPs will "use their mandate to promote equality, rights and Irish unity and designated special status for the north within the EU".
The MP for West Belfast said: "The new seven-strong Sinn Fein team of MPs is hitting the ground running.
"We have received a huge mandate from the people for our platform of equality, rights for all and Irish unity and our opposition to Brexit.
"We will meeting with British Secretary of State James Brokenshire, other political parties, trade unions and journalists as well as the Irish diaspora to update them on current political developments.
"The Sinn Fein delegation will be making the case in London for the re-establishment of political institutions, which deliver for all, and to campaign for designated special status for the north within the EU."
Sinn Fein's Northern Ireland leader said Michelle O’Neill said: "There is wide spread concern that Theresa May in seeking a deal with the DUP to remain in office will make the job of re-establishing the Executive more difficult.
"The British Government must demonstrate that they will treat all parties equally and fully honour the agreements. To this end I have sought a meeting with Theresa May as a matter of urgency.
"The deal at Westminster cannot undermine the agreements or the talks to re-establish the executive.
"Regardless of talks between the DUP and Tories all roads must lead back to an Executive, which delivers for all."