Hi AndySmith
I greatly appreciate your reply. IMHO, this is a great example of the fog of war.
The David Brown book also mentioned disbelief from the Task Force about this missile attack (including Cardiff). He published at some length the perspective from Penelope that a ('highly unique' sic) Mirage III RACKET was associated with this incident and implied disbelief with the shot-down Canberra pilots account that he was attacking Mt Kent; however, as you mentioned any super Argentina OPSEC over this incident must be offset by their lack of any public acknowledgement now, decades later.
Again many thanks for your reply.
I have vivid memories of reading about FI many years ago and have hugely enjoyed your and the others peps posts here.