A screen grab from the Stop the Spies website.

Details about everything people do on the internet, including the emails they send and the apps they use could be kept as part of the regime, the video says. Who they talk to on the phone, and who talks to them, would also be collected, as well as "your location when walking about with your mobile".

The information could be accessed with an authorisation form signed off by a senior official within the agencies. Access to such information is already possible with no judicial oversight and the government says it is only seeking to ensure the data continues to be held by telcos for a fixed time.

"The main action to take on the site is to contact your legislator or your representative," Mr Davis said. "So we allow people to put in their location or their postcode and we find the best representatives ... for them and they can then contact them via Twitter, Facebook or email.

"I guess we're just trying to show legislators that there is a large group of people who have a problem with [data retention] ... and I guess for a lot of people it's hard for them to find out their legislators' contact information or some people don't know how to. So what we're trying to do is lower the barrier to entry for people who are not used to even contacting representatives to just easily be able to do it and feel confident that they are contacting the right person."