Being away has made me feel a little detached from the sound and fury of home. But, as I used to work for them, I have followed the GCHQ/NSA business quite closely. It seems as if, suddenly and because of inept handling of the Guardian by 'the powers', people are waking up to the enormous ubiquity of surveillance in the UK.

So much has been written during the last few weeks (including this reflection from Der Spiegel in Germany) and I won't add to it here. But, what it all suggests is that – as I have written before now – (a) we need a public debate about the powers of 'the powers' who act in our name, (b) we need a public debate about what sort of security we want and expect, and (c) we need to ask if the answer to (a) and (b) has any consequence for the realism of our expectations.

We can't have our cake and eat it. If we want total security – which means giving security services some substantial leeway – there will be a cost in terms of privacy. If we want less surveillance, we must be forgiving when stuff gets missed by the security services.

Given that total security is an illusion anyway, I prefer to limit the powers of 'the powers' and then face the consequences. And I would resist complaint against the security services if/when stuff gets past them. We can't have it both ways.

If anything, however, all this Guardian/Snowden business demonstrates the importance of a free and professional press, capable of investigating and digging deep behind the propaganda. Which, of course, raises the further question about the viability of a responsible and professional press when the digital revolution is rendering the old business models obsolete and making it harder for good journalism to survive or thrive.

We have choices…