MI5 T Branch

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T Branch of MI5 was created in 1990 with responsibility for Irish counter-terrorism.[1] It is also responsible for other forms of domestic terrorism.[2]

Organisation

Directors

Sections

T1

Prepared the case for the transfer of responsibility for republican terrorism from Metropolitan Police Special Branch in 1991.[6]

T2

Responsible for Irish Terrorism in Great Britain.[7]

  • Eliza Manningham-Buller - First head of T2[8] 1992-93[9]
  • T2A: Republican and loyalist terrorism in Great Britain.
  • T2A/11 David Shayler, August 1992-October 1994.[10]
  • T2B: Liaison with local Special Branches and agent runners responsible for investigating Irish terrorism in Great Britain.
  • T2C: Threat assessment for Irish terrorist groups.
  • T2D: Researches Irish terrorist groups.
  • T2E: Liaises with Metropolitan Police Special Branch, based at Scotland Yard.[11]

T5

  • T5/0 Stephen Lander, c. 1991.[12]
  • T5B: Investigates arms trafficking
  • T5C: Counters Irish terrorism in Continental Europe, including the Republic of Ireland.
  • T5D: Irish terrorism in the rest of the world.
  • T5E: Studies terrorist logistics
  • Annie Machon Ran T5E desk, August 1993-August 1995.[13]

T8

  • T8: T Branch agent-runners, includes a Northern Ireland-based section.[14] Previously known as F8.[15]

Other T Branch officers

Agents

Notes

  1. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.772.
  2. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, pp.863-864.
  3. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.775.
  4. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.786.
  5. New Director General appointed, Security Service, 28 March 2013.
  6. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.773.
  7. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.776.
  8. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.776.
  9. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, André Deutsch, 1993, p.290.
  10. Bloody Sunday Inquiry Reports: Week 90, 6-9 May 2003, British Irish Rights Watch, accessed 7 November 2009.
  11. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and The War on Terrorism, André Deutsch, 2003, pp.320-321.
  12. Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.772.
  13. Bloody Sunday Inquiry Reports: Week 90, 6-9 May 2003, British Irish Rights Watch, accessed 7 November 2009.
  14. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and The War on Terrorism, André Deutsch, 2003, pp.320-321.
  15. Bloody Sunday Inquiry Reports: Week 90, 6-9 May 2003, British Irish Rights Watch, accessed 7 November 2009.
  16. Mark Hollingsworth, Second MI5 officer attacks security service, The Guardian, 22 July 2000.
  17. Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and the War on Terrorism, André Deutsch, 1993, p.145.