To report an imminent threat call 999 or ring the Anti-Terrorist Hotline on 0800 789 321
Current UK threat level: SEVERE Read more about threat levels >>

MI5 BETWEEN THE WARS

The years immediately after the First World War saw MI5's size being reduced drastically as a result of post-war cost-cutting. The Service's very existence came under threat for a time, but by the start of the 1930s it had gained new importance in countering communist and fascist subversion in the UK. It also played a leading role in countering Soviet espionage and obtaining information on Nazi Germany.


The inter-war years
MI5's fight for survival after World War I and its penetration of Nazi Germany's London embassy

The Soviet threat between the wars
How MI5 countered Soviet intelligence activities in the UK

Fact or Fiction?
MI5 monitors all government computers.

True False

Latest News

view ALL News

MI5 wins LGBT British Employer of the Year

MI5 has been named Employer of the Year at the 2018 British LGBT Awards.

Read Full Article ›

MI5 named in The Times Top 50 Employers for Women 2018

MI5 has been named in The Times Top 50 Employers for Women 2018. The alphabetical and unranked list celebrates UK...

Read Full Article ›