There's one side of the campaign that you don't really touch on, the revenge of the politicians.
Whilst Hacked Off with their Common Purpose background have used the Dowler and McCann cases to whip up, in their own lexicon, the useful idiots as a front for their own aims, the politicians have done exactly the same with Hacked Off as part of their own agenda.
Politicians and bureaucracy have always wanted to exercise power without the awkwardness of being held to account. The expenses scandal was on scrutiny too far for most of them as it exposed them as the venal weasels we know they are. Ultimately, any regulation in this climate is definitely not for the benefit of the public or the ordinary 'victims', it is entirely for the benefit of a few rich celebs and the political control of information.
As a side note, the bureaucrats have been trying to do this since the ending of emergency war time measures. They hated relinquishing the wartime control. Rationing, ID cards, conscription and press control have all had attempts to re-introduce them over the last 60 years using whatever causus belli that could be twisted for that aim.