Police have interviewed People Before Profit MLA Gerry Carroll about his participation in protests on the Garvaghy Road in Portadown earlier this month. Mr Carroll attended Musgrave police station voluntarily and spoke to reporters afterwards, stating he was exercising his right to free expression and peaceful assembly.

The protest arose after the Parades Commission allowed an Orange Order parade to proceed along the Garvaghy Road for the first time in nearly 30 years. The parade was ultimately blocked by a large number of protesters, and Northern Ireland Secretary Sir Chris Bryant later overturned the commission's decision.

Mr Carroll said he had stood openly as an elected representative with residents who oppose the march. He noted that a notice of their protest had been given and was referenced in open court. He maintained that everyone on the road acted peacefully and there was no evidence of violence.

His solicitor, Jack Murphy of Phoenix Law, said the MLA denies any criminal offending and described the suggestion that standing with the residents could be a criminal offence as "absurd". Mr Murphy added that the PSNI investigation is ongoing and that even police officers seemed unclear about what would happen next.

First Minister Michelle O'Neill and a number of Sinn Fein MLAs have also received letters from police asking them to attend interviews regarding their attendance at the same protest. Ms O'Neill has said she would co-operate and defended her presence as an act of solidarity with residents facing an unwanted march.

DUP leader Gavin Robinson, in a weekly email to party members, called for the chief constable to provide a "full picture" of the dissident threat that led to the parade being banned. He said that if the threat of terror was serious enough to halt a lawful parade, people should be told; if it was not, they should be told that too.

Mr Robinson described the use of powers under the Public Processions Act as unprecedented and called for transparency. He also said the PSNI investigation into potential offences during the protests must run its full course.

A court challenge to the Northern Ireland Secretary's intervention is due to be heard at Belfast High Court on Monday. The challenge was broadened to include the role played by the chief constable.

The stand-off lasted almost two weeks. Chief Constable Jon Boutcher previously said there had been no disorder, but that a major public order operation would have been required to allow the parade to proceed safely.