Falklands: SIS UKE Buenos Aires signal to GCHQ (1640Z) (decrypted Argentine signal) [British Naval Attaché comments: "This looks serious and suggests a recce of an invasion beach on the West of East Falkland"] [declassified May 2023]

Document type:	Declassified documents
Source:	HW92/15 f24
Editorial comments:	This decrypted signal was one of the earliest indications that an Argentine invasion was imminent. It seems to have been sent to the Argentine submarine Santa Fe. Read other JIC and GCHQ documents from the Falkland War. Read other documents selected from this file.
Importance ranking:	Key
Word count:	1p
Themes:	Defence (Falklands), Security services & intelligence