[andymc]

Well done on your quick response. I had to do similar on the single-lane main road near me not so long ago - a car pulled out of the local filling station, turned right and drove in the same direction I was headed, only on the right-hand side of the road - obviously a tourist or similar. I slowed down alongside him for a moment, blasted the horn, gesticulated to get over onto the left side and accelerated away. As I reached the first bend in the road a few seconds later, I saw him move across - just as a car coming from the other direction flew past me. I'm in no doubt that the averted head-on collision would have led to at least a couple of fatalities.