MI8

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Published on January 7, 2022 1:54:46 AM ● Video Link: https://www.youtube.com/watch?v=wNU5PMOHFyA

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MI8, by Wikipedia https://en.wikipedia.org/wiki?curid=100167 / CC BY SA 3.0

#Cryptography_organizations
#Signals_intelligence_agencies
#Groups_of_World_War_II
#Defunct_United_Kingdom_intelligence_agencies
#1939_establishments_in_the_United_Kingdom
#Military_communications_of_the_United_Kingdom
#War_Office_in_World_War_II
#British_intelligence_services_of_World_War_II
#Foreign_Office_during_World_War_II
MI8, or Military Intelligence, Section 8 was a British Military Intelligence group responsible for signals intelligence and was created in 1914.
It originally consisted of four sections: MI8（a）, which dealt with wireless policy; MI8（b）, based at the General Post Office, dealt with commercial and trade cables; MI8（c） dealt with the distribution of intelligence derived from censorship; and MI8（d）,
which liaised with the cable companies.
During World War I MI8 officers were posted to the cable terminals at Poldhu Point and Mullion in Cornwall and Clifden in County Galway, continued until 1917 when the work was taken over by the Admiralty.
In WW2, MI8 was responsible for the extensive War Office Y Group and briefly, for the Radio Security Service.
National HRO receiver, extensively used by the RSS MI8 was the signals intelligence department of the War Office that ran a worldwide Y-stations network.
Additionally, for an 18-month period, from late 1939 to mid 1941, it also ran the Radio Security Service, under the designation of MI8c, but this was quickly handed over to MI6.
The remainder of this page relates only to this small organisation, with, regrettably, no information concerning the major role of MI8.
The Radio Security Service evolved from the Illicit Wireless Intercept Organisation （IWIO）, which was given the designation MI1g and run by Lt Col.
J S Yule.
From an office in Broadway, IWIO collaborated with Military Intelligence, Section 5 （MI5） and with the General Post Office （GPO） to set up and control a small network of Direction Finding （DF） and intercept statio...