I do also hope that the oil platforms are defended sufficiently.
There are an awful lot of ships not declaring who they are of the coasts of the Falklands.
800 miles of coastline? Lots of minor islands? 4,700 square miles? And how many effective troops? What does that make per square mile?
What targets are important? What targets could directly or indirectly influence an attack? What about South Georgia? Targets don't have to be on the Falkland Islands.
Denial of ports & airfields are a good start.