The UN's senior counter-terrorism official is to launch an investigation into the surveillance powers of American and British intelligence agencies following Edward Snowden's revelations that they are using secret programmes to store and analyse billions of emails, phone calls and text messages.
The UN special rapporteur Ben Emmerson QC said his inquiry would also seek to establish whether the British parliament had been misled about the capabilities of Britain's eavesdropping headquarters, GCHQ, and whether the current system of oversight and scrutiny was strong enough to meet United Nations standards.