What would the airline do if someone, who has high metabolism / low sugar issues (ie, if he gets on low sugar, he might get problems) is on such a "banned nut flight", and all he brought to eat for him (which he absolutely has to) are some sugar bars, like Snickers, which contain nuts?
Would they serve him airline buy-on-board food for free?(If they have any?)
I have to assume so, isn't it? Or what would they do?