Privacy International

You can now find out find out if US intelligence agencies passed information about you to UK spies by filling in a simple online form.

Following a landmark ruling that certain spying practices were illegal, advocacy group Privacy International has simplified the process of finding out if you were a victim: just fill in this online form and provide a name and email address.

The UK's Investigatory Powers Tribunal (IPT) ruled earlier this month that certain modes of surveillance carried out before December 2014 were illegal. The ruling covers data handed by the US to the UK intelligence community listening post at Cheltenham's Government Communications Headquarters (GCHQ); specifically, data from the controversial Prism and Upstream mass surveillance programmes run by the US National Security Agency (NSA).

Prism harvests everything from emails to instant messaging conversations by tapping into technology companies, while Upstream pulls data directly from Internet cables.

You don't have to be British or even in the UK for information about you to have been potentially passed to GCHQ, so anyone in the world can fill in the form and request more information. If you have been surveilled in this way, GCHQ should inform you and delete the records -- but it will take a while.

Because the ruling only applies to surveillance carried out before December 2014, the results only cover up to that time -- if GCHQ has kept an eye on you in 2015, this form won't tell you. And if GCHQ did its own spying, you won't hear about it here.