Gentlemen,
I'm not a proffesional aviator, but having done a "few years " I always respected the maxim, if in doubt, there's no doubt ! This seems to be one of those occasions, when nature conspires to offer a challenge that precludes an easy (as usual) event. Whoever pulled the plug on the combined fly past must have judged it too risky to attempt, and should be respected for his decision, let's face it, the hissy fits so far displayed on this thread could have been predicted in his calculations. Let's just accept that the "management" of the fly past made a decision that might not have been popular, but may well have been sensible.
Smudge