https://en.wikipedia.org/wiki/Secret_Int...ce_Service
Second World War[edit]
During the Second World War the human intelligence work of the service was overshadowed by several other initiatives:
The cryptanalytic effort undertaken by the Government Code and Cypher School (GC&CS), the bureau responsible for interception and decryption of foreign communications at Bletchley Park.
The extensive "double-cross" system run by MI5 to feed misleading intelligence to the Germans
Imagery intelligence activities conducted by the RAF Photographic Reconnaissance Unit (now JARIC, The National Imagery Exploitation Centre).
GC&CS was the source of Ultra intelligence, which was very useful.[17]
The chief of SIS, Stewart Menzies insisted on wartime control of codebreaking, and this gave him immense power and influence, which he used judiciously. By distributing the Ultra material collected by the Government Code & Cypher School, for the first time, MI6 became an important branch of the government. Extensive breaches of Nazi Enigma signals gave Menzies and his team enormous insight into Adolf Hitler's strategy, and this was kept a closely held secret. [18]
MI6 assisted the Gestapo, the Nazi secret police, via "the exchange of information about Communism"; as late as October 1937, well into the Nazi era, the head of the British agency's Berlin station, Frank Foley, was still able to describe his relationship with the Gestapo's so-called communism expert as "cordial".[19]
The most significant failure of the service during the war was known as the Venlo incident, named for the Dutch town where much of the operation took place. Agents of the German army secret service, the Abwehr, and the counter-espionage section of the Sicherheitsdienst (SD), posed as high-ranking officers involved in a plot to depose Hitler. In a series of meetings between SIS agents and the 'conspirators', SS plans to abduct the SIS team were shelved due to the presence of Dutch police. On the night of 8–9 November 1939, a meeting took place without police presence. There, the two SIS agents were duly abducted by the SS.[20]
In 1940, journalist and Soviet agent Kim Philby applied for a vacancy in Section D of SIS, and was vetted by his friend and fellow Soviet agent Guy Burgess. When Section D was absorbed by Special Operations Executive (SOE) in summer of 1940, Philby was appointed as an instructor in the arts of "black propaganda" at the SOE's training establishment in Beaulieu, Hampshire.[21]
In early 1944 MI6 re-established Section IX, its prewar anti-Soviet section, and Philby took a position there. He was able to alert the NKVD about all British intelligence on the Soviets—including what the American OSS had shared with the British about the Soviets.[22]
Despite these difficulties the service nevertheless conducted substantial and successful operations in both occupied Europe and in the Middle East and Far East where it operated under the cover name Interservice Liaison Department (ISLD).[23]
http://www.topspysecrets.com/mi6-history.html
Other sections created in this time include Section N that intercepted foreign diplomatic mail, Section D for covert and paramilitary actions of political nature in war, Section 7 for economic intelligence and Section 8 for radio communications of SIS operatives.
One move in 1938 was the establishment of Section D under Laurence Grand.
Па колико оперативци у Краљевине су били у Секција Д
Бил Худсон
Sir Alexander Glen (Section D and SOE officer in the Balkans)
https://en.wikipedia.org/wiki/Sandy_Glen
Julian Amery
https://wikispooks.com/wiki/Julian_Amery
Basil Davidson
https://en.wikipedia.org/wiki/Basil_Davidson
Bill Hudson
https://en.wikipedia.org/wiki/Bill_Hudson_(soldier)
Kim Philby
https://en.wikipedia.org/wiki/Kim_Philby
Занимљиво да је био новинар за Тајмза за време Спанске Револуције
Julius Hanau
http://discovery.nationalarchives.gov.uk...r/C8949381