Diesel 10
I was on a flight with BA some years ago from Boston to LHR and was told by cabin crew there would be no nuts served with pre dinner drinks as some where down the back there was a child with a nut allergy. This has been my only experience of this while flying as most airlines have either mixed nuts etc on-board in my experience. In fact some make a feature of this, American Airlines from memory did serve hot nuts as a signature thing in Business as do a number of mid East and Far East carriers.
As for the people who suffer with this I am surprised it is not a bigger issue just because of the quantity of nut related by products used in the world now in all manor of things.
Must go and have G&T with EK now, with some hot Cashews !
Regards
Mr Mac