It is already being done is my guess. They're just trying to enshrine it in law.

http://www.bbc.co.uk/news/uk-politics-17576745

The government will be able to monitor the calls, emails, texts and website visits of everyone in the UK under new legislation set to be announced soon.

Internet firms will be required to give intelligence agency GCHQ access to communications on demand, in real time.

The Home Office says the move is key to tackling crime and terrorism, but civil liberties groups have criticised it.

Tory MP David Davis called it "an unnecessary extension of the ability of the state to snoop on ordinary people".

Attempts by the last Labour government to take similar steps failed after huge opposition, including from the Tories....