The Ministry of Defence failed to encrypt a secret document on its website that describes the exact make-up of runways, thickness of concrete and gives GPS coordinates of facilities.
The information was freely available from the homepage and would be priceless to an enemy bomber planning a strike.
It comes just 10 days after Defence Secretary Michael Fallon outlined the “very live threat” posed by the South American country and sent RAF helicopters to beef-up defences.
Buenos Aires is in talks with Russia to lease 12 Sukhoi Su-24 long-range bombers capable of attacking the Mount Pleasant base.
A senior military source said: “This is exactly the kind of intel foreign powers send spies to get.
“It’s practically an invasion handbook.”
“From an intelligence point of view, one of the most interesting details it gives to any prospective enemy is the full operating procedures for how the runways on Mount Pleasant are used.
“That gives Argentina an interesting window into how best to use a limited number of strikes and where to target them to do the most potential damage to operations.
Full article: ‘Falklands invasion guide’ containing GPS coordinates of facilities published on MoD website (Mirror)