The UN has on Tuesday called on Britain to reconsider plans to deport asylum seekers to Rwanda, warning it threatened the rule of law and set "a perilous precedent globally".

The UK government's controversial Rwanda scheme has been beset by legal challenges since 2022, but was passed by parliament late on Monday after a marathon tussle between the upper and lower chambers.

UN rights chief Volker Turk and UN refugee head Filippo Grande called in a statement on the government to "reconsider" the scheme, urging it to instead "take practical measures to address irregular flows of refugees and migrants, based on international cooperation and respect for international human rights law".

The government has been under mounting pressure to cut record numbers of asylum seekers crossing the Channel from northern France in small boats, particularly following a promise of a tougher approach to immigration after the UK left the European Union.
Its plan would compel judges to regard Rwanda as a safe third country.

It would also give decision-makers on asylum applications the power to disregard sections of international and domestic human rights law to get around a UK Supreme Court ruling that sending migrants on a one-way ticket to Kigali was illegal.

In their statement, the UN officials lamented that the plan would "restrict the UK courts from properly scrutinising removal decisions, leaving asylum-seekers with limited room to appeal even if they face significant risks".

"By shifting responsibility for refugees, reducing the UK's courts' ability to scrutinise removal decisions, restricting access to legal remedies in the UK and limiting the scope of domestic and international human rights protections for a specific group of people, this new legislation seriously hinders the rule of law in the UK and sets a perilous precedent globally," Turk cautioned.

"This arrangement seeks to shift responsibility for refugee protection, undermining international cooperation and setting a worrying global precedent."