British intelligence agencies have the capacity to monitor social media sites such as Facebook and YouTube by tapping into the cables carrying the world's internet traffic, according to documents obtained by NBC News.
The documents, reportedly taken from the US National Security Agency by whistleblower Edward Snowden, show British spies demonstrated a pilot programme to their US counterparts in 2012.
The programme, called "Squeaky Dolphin", was able to monitor YouTube in real time, collect addresses and some other user information.
According to the “Psychology A New Kind of SIGDEV [Signals Development] presentation, the Government was also able to take part in “broad real-time monitoring of online activity” of URLs “liked” on Facebook, Blogspot/Blogger visits and Twitter.
More top news
The Tory party's "anti-immigration rhetoric" could cost MPs key marginal seats in the forthcoming general election, a new report says.
Two pilots have broken the world distance record for a flight in a helium balloon after soaring over the Pacific Ocean.
The number of terminal cancer patients who die in hospital rather than at home is placing "unnecessary strain" on the NHS, a report says.