Northern Ireland Secretary Sir Chris Bryant has been urged to intervene and stop the Drumcree parade.

First Minister Michelle O’Neill said on the tenth day of the impasse over the Orange Order parade in Portadown that it had gone on too long, and urged Sir Chris to “do his job”.

Sir Chris was also pressed to appoint an international mediator to “lower the political temperature, restore public confidence in the mediation framework, and protect the wider peace process from staring into an avoidable abyss” in a letter signed by musicians and artists.

The letter, reportedly signed by a host of high-profile figures, including Noel Gallagher, Paul Weller, Ken Loach and Mick Lynch, also warned: “We cannot afford to step backward.”

“We urge you to exercise courageous political leadership at this critical juncture by looking to the international community for a neutral arbiter who can guide all sides toward a shared, peaceful future,” it reads.

It comes after Northern Ireland’s Parades Commission dramatically allowed the parade along its traditional route on the Garvaghy Road for the first time in almost 30 years.

However it has been unable to proceed due to police concerns of disorder.

Members of the Portadown District of the Orange Order remain at Drumcree Church, demanding to be allowed to begin their parade.

Protesters have maintained a presence on the Garvaghy Road, insisting that what they see as a “triumphalist” parade should not be allowed, citing the violent history of the march in the 1990s.

Speaking at Parliament Buildings on Tuesday, Ms O’Neill said Sir Chris should “use the powers that he has, and bring this situation to an end.

“It’s been going on for far too long, and we have residents who have had 10 nights of no sleep, and fear and anxiety hanging over them like a dark cloud,” she said.

“But the Secretary of State can stop this, and bring it to an end today. My message to him directly today is: ‘Chris Bryant, you should intervene, and you should bring this to a conclusion’.

“There cannot be a unwanted march down this road, that’s been very clear, it’s the wishes of the residents and the residents’ view which I fully support.”

Ms O’Neill added: “The Secretary of State could have stepped in on day one and he has failed to do so thus far.

“And here we are today 10 days later, still in this scenario. If he hasn’t been able to find a solution before now … my direct call to him today is: bring this to an end, do not allow this march down the road, take the power that you have and actually do your job.”

In a statement on social media earlier this week, Sir Chris said efforts continue to find an agreed way forward on Drumcree.

“Once again I am grateful to everyone who has offered their help and engaged in frank and open dialogue,” he said.

“We await the judgement of the Court of Appeal, but that should not stop us trying to seek a mutually beneficial outcome.

“My door remains open and I will be talking to others to try and see the situation resolved for the good of all communities in Northern Ireland.”