In reply to Niall B:
When I was learning to drive (no, not to get a stagecoach license, just in case my friends are on here!) my driving instructor said there was only on thing to remember.
Every driver is an idiot, except me and you. And I'm not sure about you.
I drive for economy almost all the time. That means I get to the speed limit and stay there, whether it is a straight or a bend. My car goes round corners at speed very well. Allowing for speedo error I don't vary far from the limit. In the Peak I frequently get stuck behind 25mph in the 60mph bits and am often overtaken when doing the limit. If people want to pass me the road is theirs, unfortunately if I want to pass, it is often made difficult by them increasing speed or meandering across the line.
I am no perfect person, just occasionally, usually in the early hours, when the roads are empty, I will have a thrash, purely to find the limits of my car to make me a safer driver. (honest!)
I do try to be considerate of other drivers, but unfortunately the vast majority of drivers get in their little ego box and are inconsiderate (many of my relative for a start, who also text and phone call on their way home from the pub!)