"Human Rights Watch and six individuals lodged a challenge with the European Court of Human Rights, demanding that the UK Investigatory Powers Tribunal confirm whether or not they were subject to surveillance by GCHQ. The
“Human Rights Watch and six individuals lodged a challenge with the European Court of Human Rights, demanding that the UK Investigatory Powers Tribunal confirm whether or not they were subject to surveillance by GCHQ. The challenge, filed on November 4, 2016, also seeks to know whether or not any such surveillance was unlawful and comes after claims filed with the UK tribunal in 2015.”
See full article: Case Takes UK Privacy Tribunal to European Court – Applicants Seek to Know if GCHQ Spied on Them, Legally or Not (HRW, link)