Point taken but policy reversal by a national government is a good deal more within the realms of possibility than a successful campaign to get the EU to do the

Point taken but policy reversal by a national government is a good deal more within the realms of possibility than a successful campaign to get the EU to do the same. Not likely at all in the UK at present but that could change if a faction within a national party decides to push anti-surveillance measures as a priority in some future general election. The difficulty is getting a consensus within the electorate to understand what's at stake.