I'm with JDNSW on this one.
I'm mildly amused by how much of the conversation is about keeping in the left lane unless overtaking.
Some of us spend most of our lives driving on roads where there is only one lane each way. Some of us even drive on roads where there isn't even a lane each way. There is just the one lane.
I wonder how some of the posters here would manage on the back road through the snowfields from Inverness to Edinborough. It has just the one sealed lane with pull-off bays every several hundred metres. Many of the streets in Inverness became a single lane as soon as cars parked on one side of the street.
When I was there in 2008, I was determined to demonstrate that I was a thoughtful, considerate driver and tried very hard to be the one that pulled over to let approaching vehicles pass. However, I never had the chance. The driver coming the other way was always even more considerate than I was and pulled over to let me pass before I had the opportunity.
I wonder how many of the impatient drivers here would survive there.
On a slightly less provocative note, I believe that there was a significant improvement in the level of compliance when the the wording was changed many years ago on the signs used on overtaking lanes. Apparently people did the right thing more frequently when the wording was changed from, "Slow vehicles keep left" to "Keep left unless overtaking".

