LS.
GCHQ's extent of snooping is listed in:
http://www.legislation.gov.uk/ukpga/1994...013_en.pdf
All authorised by an act of parliament as acting in the interests of national security, in the interests of the economic well-being of the UK, or in support of the prevention or detection of serious crime.
Given that GCHQ has the powers to monitor us via radio, telephone, and the internet and OFcom vaguely implying things which most radio engineers know is cheaply and technically possible to set up (think Busby days), I wouldn't trust that this wasn't being done.
After all controlling a country is basically a process of:
Controlling communications and the media, disarming the population, control of financial services and fuel, and to restrict freedom of movement.
It might seem like a conspiracy theroy to sheeple but that's why we sit here with open eyes.