ORGCON19 is the annual conference put on by the UK Open Rights Group (disclosure: I co-founded ORG and volunteer on its advisory board); it is "the UK's largest human and digital rights conference," and this year's conference — held on July 13 in central London — is centred on "Data and Democracy, Digital Privacy, Online Censorship & the Role of Algorithms," so it only follows that the whistleblower Edward Snowden as its keynote speaker!
Other speakers include leading human rights lawyer Ravi Naik, torture/surveillance/AI expert Cori Crider, AI and Robotics professor Noel Sharkey, and human rights activist Nighat Dad (and many more!).
The event also features "Tactical Tech Digital Security Workshops," an IoT design challenge, and many other tracks for art, interaction, law, activism, and human rights. Early bird tickets are £20 (£10; for students and unwaged people).