The British government has been urged by unionists and loyalists to set up a commission of inquiry in Northern Ireland to examine a parading dispute.
The leaders of the DUP and Ulster Unionists joined the Orange Order at a joint press conference in an east Belfast Orange Hall this morning.
They called on the Northern Ireland's Secretary of State Theresa Villiers to establish a commission of inquiry into the controversial Orange march in Ardoyne.
The march has been banned from passing the Nationalist Ardoyne area next Saturday 12 July.
The political leaders warned that their co-operation in various levels of governance at local level in Westminster and in Europe could be affected if such a probe was not ordered.
The Orange Order has also called for a series of peaceful protests at its main demonstrations across the North on Saturday.