Audio monitoring via CCTV cameras: when Blunkett thinks a surveillance measure has gone too far… etc etc. I’m sure you can fill in the rest.
Interesting, though, that his criticism appears to be centred around expectations of privacy. That is: when you’re walking down a street, you expect (and, he implies, have previously had) a measure of privacy in terms of what you say. I’m not sure he’s right on this – not because one doesn’t have an expectation of privacy in such circumstances, but because such an impression is already illusionary. Blanket surveillance is, however, a substantial shift.
To repeat my basic argument here: no, I’ve nothing to hide. But I reserve the right to absolutely have something I want to hide, at some unspecified date in the future. It is, I contend, the rôle of the people to watch their government, and not the other way around. ‘If you’ve nothing to hide, you’ve nothing to fear’ is a manifestly unsound argument.