Ever cross your mind that the person in the following car could be a close relative of someone who might be very seriously ill?Just had a ambulance behind me,we pulled to the side, and after he went by went to pull out. Only just noticed the idiot closely following the ambulance, at full speed. Passed 6 of us.
Not on an A road as well, but a B road in the New Forest.
I always used to think like you, now I'm (like the OP) a bit older I prefer to give the benefit of the doubt and let them get on with it.