The ABC Trial was a United Kingdom trial conducted in the 1970s, of three men for offences under Section 2 (wrongful communication of information) and (as dropped during the trial) of one of these men, a scholarly journalist, for an offence under Section 1 (imparting information which might be useful to an enemy for a purpose prejudicial to the safety or interests of the state) of the Official Secrets Act 1911. The men were two libertarian journalists of a similar political viewpoint as much of the Labour government, and a resigned GCHQ source seeking to heighten scrutiny of government-authorised wire-tapping and limit the work of the American espionage agency, the CIA, in Britain. These aims were furthered in the following two decades achieved through detailed parliamentary scrutiny into and regular reports as to the work of security services, a Freedom of Information Committee and regulation of wire-tapping. Aside from very limited reportage from the Central Criminal Court, its early analysis comes in the account of one of its investigative-journalist defendants, Duncan Campbell, in the annual journal Socialist Register.