Hmmm, clearly lots of well-informed 'experts' here , so why not add my twopence-worth.

My problem is small people - who insist on their 'right' to push their seats back into my face and knees, no matter whether I'm eating, drinking, reading or snoozing. For once, LiarAir have got it right with their new 737s.

And why are the seats on London's Piccadilly Line narrower than those on the Jubilee Line? Does the NE/SW axis have narrower people than the NW/SE axis?