https://www.wired.com/story/gps-ankle-tags-uk-privacy-illegal/

"The way the UK government has been tagging migrants with GPS trackers is illegal, the country’s #privacy regulator ruled on Friday, in a rebuke to officials who have been experimenting with migrant-surveillance tech in both the UK and the US."

"“Having access to a person’s 24/7 movements is highly intrusive, as it is likely to reveal a lot of information about them, including the potential to infer sensitive information such as their religion, sexuality, or health status,” said John Edwards, the UK information commissioner, in a statement. “Lack of clarity on how this information will be used can also inadvertently inhibit people’s movements and freedom to take part in day-to-day activities.”"