I was on a flight to heathrow airport in england and i saw a shiner disk shaped object outside the plane window. many other people saw it through different windows , so it couldn't have been a crack or light reflecting off of the window. it them moved up and down/ side to side so i could tell that it wasn't an aircraft. zoom into the original photo and you can see it. i also edited the other two photos to be clearer in showing the shape of the ufo.