Of course an infinite number of different situations can arise while driving, and one has to do one's best in the circs, but there are plenty of drivers who will not use the left lane irrespective. I accept that if you're in a van, with poorer visibility than a car, you're entitled to a bit more leeway!One of my biggest motorway driving bug bears, is re-joining the middle lane, having used the outside lane for overtaking, only to find a parallel vehicle wanting to occupy the same space, but overtaking and exiting the nearside lane - whilst I'm in the van on my own. You have to plan way ahead because your side mirrors aren't always able to capture what you need to see in your blind spots.
