Spy chief Sir Iain Lobban: 'Majority of public not monitored'
7 November 2013 Last updated at 16:05 GMT
GCHQ director Sir Iain Lobban has told MPs and peers that it does not spend its time monitoring the phone calls and emails of the majority of the public.
He was being grilled alongside the head of MI5 Andrew Parker and MI6 chief Sir John Sawers in an unprecedented public hearing.
He rejected the suggestion that GCHQ was seeking to collect everyone's data and communications.