MI5 B Branch

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B Branch is the division of MI5 responsible for personnel, security and training.[1]

History

In 1929, an early incarnation of B Branch was responsible for 'investigations and inquiries'.[2]

Following a 1938 re-organisation, B Branch acquired responsibility for counter-espionage and counter-subversion.[3]

In Dick White's 1953 re-organisation of the service, B Branch became responsible for personnel and establishments.[4]

Organisation

Directors

B1

Recruitment and security of MI5, including vetting of staff, according to Stephen Dorril.[8] Protective security for MI5 including building security and staff vetting, according to Nick Fielding and Mark Hollingsworth.[9]

B2

Personnel management and welfare.[12]

B3

Management services, personal and physical security of MI5 officers and building, according to Stephen Dorril.[15]

B4

Responsible for Finance.[17]

B7

Training and recruitment, according to Hollingsworth and Fielding.[19]

Position not known

Notes

  1. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.865.
  2. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.127.
  3. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.134.
  4. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.327.
  5. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.333.
  6. Paul Lashmar and James Oliver, Britain's Secret Propaganda War 1948-1977, Sutton Publishing, 1998, p.157.
  7. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  8. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  9. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and The War on Terrorism, André Deutsch, 2003, pp.320-321.
  10. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.330.
  11. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  12. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  13. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  14. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.561.
  15. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  16. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  17. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  18. Stephen Dorril, The Silent Conspiracy: Inside the Intelligence Services in the 1990s, Mandarin, 1994, p.485.
  19. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and The War on Terrorism, André Deutsch, 2003, pp.320-321.
  20. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.330.