I noticed that Londoners have a certain way of communicating with each other on the tube - a form of communication that I am not unfamiliar with, as I've used it many times myself with other Londoners around the city. What is this communication tactic, you might ask? The eye contact, eye-roll and shrug all muddled into one look. It's almost a silent language, but quite entertaining to notice once you've picked up on it.