A judge has ruled that provisions of the UK’s Illegal Migration Act – which created powers to send asylum seekers to Rwanda – should be disapplied in Northern Ireland.

The High Court in Belfast on Monday morning ordered the “disapplication” of sections of the act as they undermine human rights protections guaranteed in the region under post-Brexit arrangements.

The Illegal Migration Act provides new powers for the government to detain and remove asylum seekers it deems to have arrived illegally in the UK. Central to the new laws is the scheme to send asylum seekers to Rwanda.

Mr Justice Humphreys said aspects of the Illegal Migration Act were also incompatible with the European Convention on Human Rights (ECHR).

Following Brexit, the UK and the EU agreed the Windsor Framework, which stipulates there can be no diminution of the rights provisions contained within the Good Friday peace agreement of 1998, even if they differ from the rest of the UK.

The judge found several elements of the Illegal Immigration Act cause a “significant” diminution of the rights enjoyed by asylum seekers in Northern Ireland under the terms of the Good Friday Agreement.

“I have found that there is a relevant diminution of right in each of the areas relied upon by the applicants,” he said.

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He added: “The applicants’ primary submission therefore succeeds. Each of the statutory provisions under consideration infringes the protection afforded to RSE (Rights, Safeguards and Equality of Opportunity) in the Belfast/Good Friday Agreement.”

The judge ruled that the sections of the Act that were the subject of the legal challenges should be “disapplied” in Northern Ireland.

He also declared aspects of the Act incompatible with the ECHR.

The case was brought to Belfast’s High Court by the Northern Ireland Human Rights Commission and a 16-year-old asylum seeker from Iran who arrived in the UK as an unaccompanied child on a small boat from France last summer.

He is currently living in Northern Ireland where his application has not yet been determined but said he would be killed or sent to prison if returned to Iran.

Mr Justice Humphreys agreed to place a temporary stay on the disapplication ruling until another hearing at the end of May, when the applicants will be able to respond to the judgment.

Dr Tony McGleenan KC, representing the government, indicated that an appeal may be considered.

“We’ll be taking our instructions on the judgment and the position in terms of any further litigation will become clear, my Lord,” he said.

Lawyer Sinead Marmion, who represented the teenager, said the judgment was “hugely significant”.

She said it would prevent the Rwanda scheme applying in Northern Ireland.

“This is a huge thorn in the government’s side and it has completely put a spanner in the works,” she said.

“There’s a huge obstacle in the way of them being able to actually implement that in Northern Ireland now, as it’s been found to be incompatible with the Windsor Framework.”

Sky News has contacted Rishi Sunak’s office for a comment on the ruling.

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