Well, I'd say that was a very sensible and measured report from Argentina.
What did people expect? "Los hijos de putas invaded our beloved country"?
The weather at Base Aerea Gringo, Islas Malvinas, is notoriously unpredictable and, at this time of year, is particularly dog$hit. So a diversion is not terribly surprising, if the weather-guesser porked-up his morning session with his beetles and fir cones and failed to forecast the likelihood of fog.
As for the bolleaux about Cat III operation, I think that anyone who is familiar with the Islas will know all about the terrain problems which rule out such installations. Whether the training cost would be worth the effort and expense for the few days per year when Cat III would actually be necessary even in the UK is a matter of doubt.