Yeah, let's have a US style first amendment to the British Constitution - that card game really needs an amendment.
Seriously, the reason the Snowden affair has gained so much traction in the USA is because Americans have their first amendment - enshrined in their bill of rights is the freedom of speech, religion and expression without fear of persecution; and then they finally get proof that their own government is gathering private/personal information for the purposes of flaunting the first amendment.
America is a great idea - it just doesn't work how they believe it should.
Why the [LIFTED] would we want to adopt a false security blanket? Nothing will abate the depredations of the UK government on it's own people, least of all a flawed system that patently fails to flourish in it's home soil.