GCHQ green plaque
London, England, United Kingdom
1919-1921 The first home of GCHQ The Uk's intelligence, security and cyber agency known then as GC&CS, formed from the Admiralty's Room 40 and the War Office's MI1(b)
Listen to the audio guide for GCHQ green plaque Free on WIP — starts by itself when you arrive, even with the screen off