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APPENDIX 2 559<br />

1982 Gordon Welchman threatened with OSA over<br />

Hut Six Story<br />

1982 GCHQ's Little Sai Wan closed down and<br />

moved to Chum Hom Kok<br />

26 Jun. 1982 Geoffrey Prime confesses<br />

15 Jul. 1982 Prime remanded in custody on OSA charges<br />

23 Sept. 1982 James Bamford's Puzzle Palace published<br />

10 Nov. 1982 Geoffrey Prime pleads gUilty<br />

1983 STU-III secure speech unit introduced by NSA<br />

Sept. 1983 Peter Marychurch becomes Director of GCHQ,<br />

taking over from Brian Tovey<br />

1 Dec. 1983 Pilot polygraph machine arrives at R12 at<br />

Cheltenham<br />

Dec. 1983 Decision on de-unionisation taken by ad hoc<br />

Cabinet committee<br />

25 Jan. 1984 GCHQ staff receive GN 100/84 letter on unions<br />

17 Apr. 1984 WPC Yvonne Fletcher shot outside the Libyan<br />

People's Bureau in London<br />

1984 GCHQ's Brora station in Sutherland closed<br />

1985 Paul Foster becomes Director of CESG, taking<br />

over from Alastair Anderson<br />

1985 Interception of Communications Act<br />

1 Aug. 1985 KGB officer Vitaly Yurchenko defects and<br />

reveals NSA spy 'Ronald Pelton<br />

5 Jun. 1986 Pelton convicted of espionage for the KGB<br />

6 Jun. 1986 Jonathan Pollard pleads gUilty to espionage for<br />

Mossad<br />

1986 Joint Speech Research Unit at GCHQ amalgamated<br />

with Speech Research Group at RSRE to<br />

form Speech Research Unit<br />

20 Jan. 1987 European Commission for Human Rights<br />

31 Jul. 1988<br />

1989<br />

1989<br />

declares GCHQ trade union case inadmissible<br />

Hawklaw station in Fife closed<br />

Hilltop station at Teufelberg in Berlin closed<br />

John Porter becomes Director of CESG, taking<br />

over from Paul Foster

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