I guess it would depend on how it was framed by the media, certainly if things like secret police were created that would probably cause an uproar. Free speech, it would depend on how it was curtailed, but I imagine that most attempts at curtailment would see a protest. Privacy, not really sure about to be honest, in regards to electronic privacy, well I think most people have just assumed that they are being monitored, hence the complete lack of surprise to the Snowden 'revelations'. Free Association...I doubt that exists completely in a modern society, not even in America...because let's face it, a good percentage of Americans just parrot what the biased media sources feed them, likewise Brits.
You seem to think that just because we don't have the right to bear arms that we are an oppressed society? That makes a good portion of the whole planet oppressed, and some rather dodgy nations unoppressed, Somalia for one. I think that there may just be a smidge of bias in your assumptions.
I for one am reasonably content, I have a roof over my head, I've got access to free healthcare (for the moment), access to food and water, and access to a relatively uncensored internet (with the only real censoring being pirates and porn).
Besides, Brits do protest, it just rarely makes the news because we generally don't make too much of a fuss about it, the war against Iraq saw over a million people in protest in London, in fact if you go down outside the Houses of Parliament on any day of the week you will find a group protesting on something.