the two Hercs involved were painted black
And what does that prove? I have no doubt that the MOD took considerable precautions before sending in their aircraft, after all they could hardly just ring up the handling agent and ask for a sitrep (which is what we do). But the fact that they took due precaution does not mean that commercial flights were impossible.
I standby to be corrected, but I would like to see some evidence that the airfield used by the RAF for the evacuations was closed to commercial traffic. Whatever the case, the RAF should bill the oil companies concerned, and preferably a lot more than they would have paid to use commercial charter flights.