Apple has removed its strongest iCloud data protection for customers in the UK, as a refusal to comply with a government order demanding backdoor access to user data.

If a U.K. user has not already signed up for Advanced Data Protection, they will not be able to as of February 21, Apple said. Instead, those users will see a message: “Apple can no longer offer Advanced Data Protection (ADP) in the United Kingdom to new users.”

Security officials argue that encryption hinders criminal investigations, while tech firms defend it as essential to user privacy.