Eighty asylum seekers locked up by the UK government under the "one in, one out" scheme have asked the UN to investigate their treatment. They say they faced "fear, humiliation, and psychological distress" since arriving on small boats. These detainees wrote a report titled "Report on conditions and treatment at Harmondsworth immigration removal centre." Harmondsworth is a detention centre near London's Heathrow airport. The group includes people from Sudan, Afghanistan, and Iran. They accuse the Home Office of arbitrary detention, denying legal help, inadequate medical care, degrading treatment, and causing severe mental health issues. The asylum seekers say they came to the UK seeking "safety, dignity, and a chance to live a peaceful life." They urge the UN and human rights groups to act quickly to check the conditions faced by those detained for deportation under this scheme. The report emerges as new UK powers let police seize mobile phones of small boat arrivals, aiming to investigate people smugglers. A new offence can punish information gathering useful to illegal crossings with up to five years in jail. Despite tough measures, over 41,000 people crossed to the UK by small boats in 2025, the second-highest number ever. The UN's International Organization for Migration notes fewer deaths in 2025 (36) compared to 2024 (85), despite more crossings. The first flight back to France of 2026 under the scheme is set for Wednesday. The Home Office says 193 people have been sent to France so far, with 195 brought legally to the UK. This is less than a quarter of the 803 who crossed by boat on December 20 alone. The detainees say they did not get enough rest or psychological support after their tough journeys and Home Office interviews. Many haven’t contacted their families since detention began. Medical care is also reportedly poor. The report details serious mental health problems: “Many detainees are young adults ages 17 to 30. They report widespread depression, anxiety, insomnia, and emotional breakdowns. Some have tried self-harm and have been placed in isolation or punishment units.” The detainees say their treatment violates human rights and punishes them for seeking protection. They ask only for "fairness, humanity, and freedom" and to be "seen, heard, and treated as human beings," the report states. Requests for comment were sent to the Home Office and the UN refugee agency.