The UN human rights office has said that it remains "extremely apprehensive about the ramifications" of the UK government's plans to send certain migrants to Rwanda if they enter the country unlawfully.

The UK home secretary, Suella Braverman, has said that foreigners can feel safe in Rwanda.

She said on Sunday that she believed the Rwanda policy would have "a significant deterrent effect" so that people would stop making the journey across the Channel to the UK.

But the UN human rights office said assessments done by the UN refugee agency showed that the asylum system in Rwanda was "not robust enough".

"There are also concerns about respect for the right to freedom of assembly and freedom of expression in Rwanda. Those concerns do remain today," spokesperson Ravina Shamdasani told the BBC's Newsday programme.

"We have a lot of evidence of how these plans [off-shore asylum facilities] go wrong," she added.