Mark Nelson took the call in an immigration detention center—a place that, to him, felt just like prison. It had the same prison windows, the same tiny box rooms. By the time the phone rang, he’d already spent 10 days detained there, and he was wracked with worry that he would be forced onto a plane without the chance to say goodbye to his kids. So when his lawyers relayed the two options available under UK law—either stay in detention indefinitely or go home wearing a tracking device—it didn’t exactly feel like a choice. “That’s being coerced,” says Nelson, who moved from Jamaica to the UK more than 20 years ago. He felt desperate to get out of there and go home to his family—even if a GPS tag had to come too.
It was May 2022 when the contractors arrived at Colnbrook Detention Center, on the edge of London’s Heathrow Airport, to fit the device. Nelson knew the men were with the government’s Electronic Monitoring Service, but he didn’t know their names or the company they worked for. Still, he followed them to a small room, where they measured his leg and locked the device around his ankle. Since then, for almost two years, Nelson has been accompanied by the tag wherever he goes. Whether he is watching TV, taking his kids to school, or in the shower, his tag is continuously logging his coordinates and sending them back to the company that operates the tag on behalf of the British government.
Nelson lifts up his trousers to reveal the tag, wrapped around his leg, like a giant gray leech. He chokes down tears as he describes the impact the device has had on his life. “It’s depressing,” he says, being under constant surveillance. “Right through this process, it’s like I’m not a human anymore.”
In England and Wales, since 2019, people convicted of knife crime or other violent offenses have been ordered to wear GPS ankle tags upon their release from prison. But requiring anyone facing a deportation order to wear a GPS tag is a more recent and more controversial policy, introduced in 2021. Nelson wears a tag because his right to remain in the UK was revoked following his conviction for growing cannabis in 2017—a crime for which he served two years of a four-year sentence. But migrants arriving in small boats on the coast of southern England, with no previous convictions, were also tagged during an 18-month pilot program that ended in December 2023. Between 2022 and 2023, the number of people ordered to wear GPS trackers jumped by 56 percent to more than 4,000 people, according to research by the Public Law Project, a legal nonprofit.
“Foreign nationals who abuse our hospitality by committing crimes in the UK should be in no doubt of our determination to deport them,” a Home Office spokesperson tells WIRED. “Where removal isn’t immediately possible, electronic monitoring can be used to manage foreign national offenders and selected others released on immigration bail.” The Home Office, the UK’s interior ministry, declined to answer questions on “operational details,” such as whether GPS coordinates are being tracked in real time and for how long the Home Office stores individuals’ location data. “This highly intrusive form of surveillance is being used to solve a problem that does not exist,” says Jo Hynes, a senior researcher at the Public Law Project. GPS tags are designed to prevent people facing deportation orders from going on the run. But according to Hynes, only 1.3 percent of people on immigration bail absconded in the first six months of 2022.
Now, Nelson is the first person to challenge Britain’s GPS tagging regime in a high court, arguing that the tags are a disproportionate breach of privacy. A judgment on the case is expected any day now, and critics of GPS tagging hope the decision will have ripple effects throughout the British immigration system. “A judgment in Mark’s favor could take quite a lot of different forms,” says Jonah Mendelsohn, a legal officer at data rights group Privacy International. He adds that the court could force the Home Office to stop tagging migrants altogether, or it could limit the amount of data the tags collect. “It could set a precedent.”
The GPS tags are part of an intensifying surveillance regime that migrants and refugees are now subject to in the UK, the US, and Australia, says Mendelsohn. “There is so much tech that’s being rolled out and used almost in an experimental lab-esque way,” he says, pointing to how migrants arriving in Britain on small boats have been told to hand over their phones and pin codes or fitted with bar-coded wristbands. “GPS tracking is just one aspect of that.”
Allegations that the tags are prone to malfunction also aggravate the stress people feel while wearing them, Mendelsohn says. By law, the tags can’t be removed. But they still need charging, either by being plugged into a socket or a portable battery pack. Nelson’s first tag would run out of battery every two hours, he claims, meaning he could never travel far from a plug socket—failure to charge a tag can count as a breach of immigration bail conditions, risking return to a detention center.
The battery was just one in a series of problems, Nelson claims. Between November 2022 and May 2023, he believes his tag was no longer logging his GPS coordinates, with his legal team at Wilsons Solicitors arguing this proved the tag was redundant and should be removed. But until now, the Home Office has refused to take off the tag. “[They said] the law is the law and I’m subject to the law,” says Nelson. “So I’ve got to wear this broken tag whether it works or not.” The company that monitors and maintains the tags on behalf of the government since 2014, Capita Business Services, did not reply to WIRED’s request to comment.
Nelson might have been the first person to challenge the GPS tagging regime in court. But others were close behind. British law firm Duncan Lewis Solicitors is representing another four people forced to wear GPS tags, ranging from EU citizens to people who arrived in the UK on small boats. “Such surveillance of vulnerable individuals is not necessary in any democratic society, and we are proud to represent these claimants in their fight against this poorly run and dystopian regime,” says Conor Lamb, who works in the public law department at Duncan Lewis.
One of the people whom Duncan Lewis is representing is a 25-year-old former asylum seeker from Sudan who arrived in the UK via a small boat and has no criminal history, according to his lawyers. The tag brought up painful memories of being bound and tortured during his journey to the UK, they argued in court. After two psychiatric reports were submitted to the government, the tag was taken off and his data deleted. Despite that, the man, who uses the pseudonym ADL, remains part of the court case in order to challenge the practice of tagging new arrivals.
Meanwhile, Nelson is still waiting for his tag to be taken off. He’s frustrated that he has to wear the tag despite already having served his time in prison. “Before all of this, I was social,” he says. Now, he says, he’s too self-conscious to go out much, in case others see the tag and mistake him for the perpetrator of a violent crime. He describes how the tag has left him feeling “up and down,” as if he has no good choices left. “In order for me to see my family and to be part of my family, I’m still being forced into 24/7 monitoring, someone watching me and watching what I do, every day.”
