Re: Nicely Done Reg!
"Ways of protecting accused or accuser for example until a case is confirmed one way or the other to prevent tarnishing reputations."
Or protecting other interested parties, eg. covert operations groups (eg the people in charge of Mark Kennedy/Stone's extrremely dubious covert survellaince of a lawful peaceful 'protest' group).
And then there's the criminal (in more than one sense) trial of Erol Incedal, in which almost all the evidence was kept secret in unprecedented (and frankly unbelievable) ways. Something to do with a certain Tony Blair, perhaps, who knows:
http://www.pressgazette.co.uk/repormedia-groups-lose-court-appeal-bid-lift-ban-reporting-details-tony-blair-plot-terror-trial/ (9 Feb 2016)
Nicely done El Reg.