Flight etiquette: How to avoid a row over reclining plane seats

Getty ImagesA lot of us have been there, locked in a metal cylinder flying at more than 500mph (804km/h), gritting our teeth about the armrest the person to the left is hogging.Or the person next to the window who keeps getting up to go to the toilet, or the person in front who has suddenly put their seat back, squashing your knees.With roughly half of the UK's households flying once a year, how people behave on…