Falklands: Flag Officer Submarines (FOSM) signal to GCHQ (0827Z) ("Ref request for San Luis/Spartan movements") [British SSN seeking to attack Argentine submarine] [declassified May 2023]

Document type:	Declassified documents
Source:	HW92/17 f49
Editorial comments:	FOSM commanded British SSNs at Northwood. SIGINT about the San Luis was the subject of a possible security breach on 15 April. Correspondence on this topic may be read here. Read other JIC and GCHQ documents from the Falkland War. Read other documents selected from this file.
Importance ranking:	Major
Word count:	1p
Themes:	Defence (Falklands), Security services & intelligence