Which type of plane passenger annoys you most?

What grinds your gears about the behaviour of other people when it comes to travelling? Drunk passengers on a flight, people putting their seat back while you're eating? And how do you approach the situation when it arises? There's a new guide on this and all other travel etiquette matters to help you through the minefield of travel around the world and the nuances between different countries. The guide was put together by Expedia and Etiquette expert William Hanson - he joined Stephen this morning.