"Today’s ruling represents a significant step forward in the protection of privacy and freedom of expression worldwide. It sends a strong message to the UK Government that its use of extensive surveillance powers is abusive and runs against the very principles that it claims to be defending," Amnesty International’s Strategic Litigation Director Lucy Claridge said.
The case is based on three applications filed by a coalition of rights groups and organizations, including Amnesty International and Big Brother Watch, against the United Kingdom in September 2013, September 2014 and May 2015.
READ MORE: UN Team Investigates UK Human Rights Record, Mass Surveillance, Racial Profiling
These actions followed Snowden's revelations that the UK Government Communications Headquarters (GCHQ) was running an operation called Tempora that allowed it to tap into and store large volumes of data, including phone calls, messages and internet communication.