surveillance privacy security economics trust snoopers' charter cdb digital economy act dea investigatory powers bill copyright kafka data retention internet connection records icrs big data civil rights phone tapping law enforcement muamba challenger hillsborough terrorism cover up s1 malicious communications act 1988 s4-5 public order act 1986 south yorkshire police secrecy birmingham six lord denning shirley mckie s127 communications act 2003 diane vaughan twitter robin hood airport paul chambers dpp twitter joke trial free speech behaviour communications data bill regulator open university open content openlearn
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