Yes they should be banned.
The connection with eating in a resataurant and being on a flight where nuts are served is that for the lady on This Morning and for a great many people just the particles in the air, touching the loo door handle after someone had eaten nuts could set off anaphalaxis.
The woman used 2 epi pens and piriton and still she died before the ambulance crew could get there! They revivied her but the damage was done. WTAF would you do in a plane?
Saying an allergy is nothing and that being in the same place as nuts/nut particles is dangerous is bullshit is pure ignorance.
NOBODY need to eat nuts during a flight, there are a million other things they could eat, selfish beyone belief putting your wants (NOT NEEDS) before another persons life.