MI5/D Branch

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Group.png MI5/D BranchRdf-entity.pngRdf-icon.png
Formation1938
Parent organizationMI5 thames house.jpg MI5
TypeIntelligence agency.png intelligence agency
Interests counter-espionage

D Branch is the division of MI5 responsible for non-terrorist threats and protective security, including counter-espionage. It is one of four operational branches which report to the Deputy Director General of the Security Service.[1]

History

The designation 'D Branch' has been applied to a variety of functions over the course of MI5's history.

1916-Imperial Intelligence

The earliest version of D Branch was created in 1916, shortly after the foundation of MI5, to cover imperial and overseas (including Irish) intelligence.[2]

1938-Protective Security

By 1929, MI5 had been reduced to two branches, A and B.[3] In 1938, D Branch was re-established with responsibility for protective security in munitions, aircraft factories and dockyards.[4]

1953-Counter-espionage

In Dick White's 1953 re-organisation of the Service, D Branch became the division responsible for counter-espionage.[5] From 1965-1970, Hugh Fraser worked for D Branch, where he "ran agents against Russian diplomats serving in Britain in an effort to establish whether they were actually KGB agents".[6]

In 1968, Michael Hanley was appointed head of D Branch, and carried out a re-organisation which led to its replacement with MI5 K Branch.[7]

1994-Non-terrorist threats

In MI5's organisation as of 1994, D Branch had been re-established. Its current incarnation includes elements of the former C Branch, F Branch and K Branch.

Organisation

Sections

  • D1: Vetting of non-MI5 personnel.
  • D4: Counter-espionage. Targets include Russia and China.
  • D5: D Branch agent runners.[8]

 

Employee on Wikispooks

EmployeeJobAppointedEndDescription
Hugh FraserSoldier19651970
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References

  1. ↑ Michael Smith, The Spying Game, Politico's, 2003, pp.129-130.
  2. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.84.
  3. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.127.
  4. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.134.
  5. ↑ Christopher Andrew, Defence of the Realm, The Authorized History of MI5, Allen Lane, 2009, p.327.
  6. ↑ http://www.telegraph.co.uk/news/obituaries/1334494/Hugh-Fraser.html
  7. ↑ Peter Wright, Spycatcher: The Candid Autobiography of Senior Intelligence Officer, Viking, 1987, pp.332-334.
  8. ↑ Mark Hollingsworth and Nick Fielding, Defending the Realm: Inside MI5 and The War on Terrorism, André Deutsch, 2003, pp.320-321.