Crowd gathers on Garvaghy Road early on Sunday morning to protest against the ruling allowing the march.

Northern Ireland’s High Court has permitted the Orange Order, a Protestant organisation, to march through a mainly Catholic area in the town of Portadown for the first time in 28 years, reviving one of the region’s most contentious marching disputes.

The court rejected a final attempt by residents to stop the parade passing through the Garvaghy Road early on Sunday, after Northern Ireland’s Court of Appeal overturned a temporary injunction granted on Saturday.

Large crowds gathered on the road before the procession, with the Belfast Telegraph reporting that protesters planned to block the route peacefully by linking arms.

First Minister Michelle O’Neill, vice president of Sinn Fein, an Irish nationalist party that supports a united Ireland, joined residents opposing the march.

In a statement posted on X on Sunday, she backed their right to protest and urged restraint, saying, “I am calling for calm on all sides.”

Sinn Fein leader Mary Lou McDonald also condemned the court decision in a post on X early on Sunday, calling it “disgraceful” and saying her party stood with the Garvaghy Road community.

Deputy First Minister Emma Little-Pengelly, from the Democratic Unionist Party (DUP), which supports Northern Ireland remaining part of the United Kingdom, urged people to stay away from the area.

She said on Sunday that threats of violence were unacceptable and added: “No one in Northern Ireland wants violence or disorder.”

The Orange Order is a Protestant organisation closely associated with unionism, the political tradition that favours Northern Ireland remaining in the UK.

The Parades Commission, the independent body that rules on disputed marches in Northern Ireland, approved Sunday’s procession with a 35-person limit, barred bands and accompanying supporters, and required the march to finish by 9:30am (08:30 GMT).

The dispute over the Drumcree parade and Garvaghy Road became one of the most bitter marching confrontations of the “Troubles”, the decades-long conflict over Northern Ireland’s political status that largely ended with the 1998 Good Friday Agreement.

Repeated attempts by the Orange Order to return from Drumcree church along Garvaghy Road triggered protests, violence and major security operations during the 1990s.