D Branch MI5 1994-
Non-terrorist threats
D Branch was the division of the Security Service responsible for non-terrorist threats and protective security, including counter-espionage, from the mid-1990s. It was one of four operational branches which report to the Deputy Director General of the Security Service. (Ref 1, pp.129-130).
Keep reading with a 7-day free trial
Subscribe to Tom Griffin on intelligence history to keep reading this post and get 7 days of free access to the full post archives.