Tom Griffin on intelligence history

Tom Griffin on intelligence history

Secret Intelligence Service (SIS or MI6)

Tom Griffin's avatar
Tom Griffin
Nov 22, 2022
∙ Paid
Share

The SIS building at Vauxhall Cross (Tagishsimon at the English-language Wikipedia, CC3.0).

The Secret Intelligence Service (SIS), popularly known as MI6, is Britain's main foreign intelligence service.

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.

Already a paid subscriber? Sign in
© 2025 Tom Griffin
Privacy ∙ Terms ∙ Collection notice
Start writingGet the app
Substack is the home for great culture