MI5 F Branch

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History

In its earliest incarnation, F Branch was responsible for preventive intelligence in the MI5 organisation of 1916.[1]

A new F Division covering counter-subversion was established by Director General Sir David Petrie in 1941.[2]

Counter-subversion branch

In Dick White's 1953 re-organisation, F Branch had responsibility for counter-subversion at home, while E Branch was responsible for counter-subversion in the British Empire and Commonwealth.[3]

In 1972, F Branch director John Jones defined subversion as "activities threatening the safety or well-being of the State and intended to undermine of overthrow Parliamentary democracy by political, industrial or violent means."[4]

In 1976, Director General Michael Hanley established a separate FX branch to deal with Irish terrorism. Its director continued to report to the director of F Branch.[5]

Targets

The Left

Labour

F1A section was tasked in 1975 to launch an wide-ranging investigation of subversion in the Labour Party.[6]

Communist Party of Great Britain

In April 1976, a threat assessment by F2 section argued that the Communist Party of Great Britain (CPGB) was a major subversive threat in the trade union movement.[7]

Trade Unions

TGWU

In October 1970, MI5 obtained a Home Office warrant against the general Secretary of the TGWU, Jack Jones, because of his contacts with the Russians. MI5 head Martin Furnival Jones noted that Jones was unlikely to be charged with espionage, but the operation "could be of great value in particular to the Department of Employment and to the Government generally in the field of industrial disputes.[8]

National Union of Mineworkers

According to Christopher Andrew, MI5 was unable to provide the Government with a full intelligence picture during the 1972 miner's strike, because its remit only extended to figures such as the Communist Scottish NUM leader Mick McGahey.[9]

On 14 November 1972, MI5 obtained a Home Office warrant against Arthur Scargill, "to help establish the extent of communist influence on present negotiations in the mining industry."[10]

Structure

Directors

F1

Responsible for investigating the Communist Party of Great Britain, according to Stephen Dorril.[14]

  • F1/O - Assistant Director in charge of monitoring the CPGB and other subversive organisations, i.e head of F1 section.[15]
  • Bill Ruckstan, section head, c.1981-83.[16]

F1A

This section was tasked in 1975 to launch an wide-ranging investigation of subversion in the Labour Party.[17]

  • F1/A - noted in 1975 that work in this field was expanding to include the 'Ultra Left' where previously it had focused on Communists.[18]

F1B

A full-time desk on Irish security issues, with a particular focus on the North, was set up in F1B in the spring of 1969. By the autumn of that year, F1B consisted of a female assistant officer supported by the young Stella Rimington.[19]

F1C

In the spring of 1969, an internal MI5 newsletter stated: "The total effort deployed by F. Branch in matters Irish was until recently confined to one part-time desk officer in F.1.C.[20]

F2

Responsible during the early 1980s for investigating trade unions and the production of Box 500 reports, according to Stephen Dorril.[21]Responsible for investigating the Communist Party, according to Nick Fielding and Mark Hollingsworth.[22]

F2N

Trade Unions[27]

F2R

The media, education, Members of Parliament.[28]

F3

Terrorism, excluding Irish Terrorism.[29]

F5

Irish terrorism, (loyalist).[31]

FX

In the early 1980s, according to Stephen Dorril, FX controlled F4 and F6. Focussed on long-term infiltration of agents and informers.[33]

F4

Trade unions and Communist Party of Great Britain (CPGB).[35]

F6

Trotskyist and radical organisations.[38]

F7

Innvestigated Trotskyist, anarchist, feminist, pacifist, black power, nationalist and other radical groups. Also fascists.[40]

Other F Branch officers

Notes

  1. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.84.
  2. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.236.
  3. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.327.
  4. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.591.
  5. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.647.
  6. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.660.
  7. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.656.
  8. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.588.
  9. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.593.
  10. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.598.
  11. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, Andre Deutsch, 2003, p.136.
  12. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.621.
  13. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  14. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  15. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.591.
  16. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  17. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.660.
  18. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.660.
  19. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.604.
  20. ↑ Christopher Andrew, The Defence of the Realm: The Authorized History of MI5, Allen Lane, 2009, p.602.
  21. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  22. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, Andre Deutsch, 2003, p.34.
  23. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.281.
  24. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, Andre Deutsch, 2003, p.34.
  25. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  26. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.8.
  27. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  28. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  29. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  30. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  31. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  32. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  33. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  34. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  35. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  36. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  37. ↑ Julia Pirie, The Telegraph, 28 October 2008.
  38. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  39. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  40. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  41. ↑ Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.486.
  42. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.558.
  43. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, Andre Deutsch, 2003, p.35.
  44. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, Andre Deutsch, 2003, p.101.
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