Aircraft landing at airports across Europe creating wing vortex trails looks as if the planes are "drawing in the sky".<br /><br />The footage filmed at Bristol, Gatwick, Heathrow and Frankfurt airport show the smokey trails forming from the aircraft's wings.<br /><br />The filmer told Newsflare: "Air flows from below the wing and out around the tip to the top of the wing in a circular fashion. <br /><br />"As the air pressure in the core is low, so is the temperature - if the temperature drops as far as the 'dew-point', the water vapour present will condense, this is what we can see."
