Why oh why do people insist on sitting in the middle lane of a Motorway or an A road and do 10 or so miles under the speed limit. Even worse though they seem to think that when they join the road the cars/lorries already on the carriageway have to give way to them, just by putting on your indicator does not give you the right to pull out in front of other cars. Then when flashed they just ignore it and continue to cause an obstruction, when you do manage to get past the look that they give you is unreal. There should be a minimum speed limit on those roads and if you are unable to drive correctly then please stay off them. we who drive for a living have enough trouble of getting from A to B without having to go round cars driven by inconsiderate people.