Am not taking any offence, just being Devils Advocate.
It beggars the question that something has changed, ie politically, armed might etc, otherwise their would be no sabre rattling by Argentina and the response.
Regretably the UK who are politically correct to madness, like us adhere to rules of engagement which cost unnecessary lives, but not the enemy.
Don't forget the time delay, in getting your "forces to the field of battle", their vulnerability along the way, and maintaining them whilst there.
Forget about blaming the press, you can't hide that kind of movement of ships and equipment. Also why is it not conceivable, that stuff was leaked to the press, to "frighten" Argentina, look out the big stick is coming. Well hello, I have time before it gets here and I wont make the same mistakes twice.
Israel beat Egypt on previous occasions, but they (Egypt) learnt valuable lessons, awaited their time, and succeeded, although it was short lived, only because their Arab allies failed to stick to the plan and rally in time.
The old saying a stitch in time saves nine is never applied. We only deal with crisis. We are too powerful, it will go away, if not we can and will deal with it, sounds familiar.
Why wouldn't other counties in the region support Argentina this time round, particularly if it serves their political interests/strategies.