In reality he was annoyed at you driving so slow Then when he tried to overtake, found he could not drive ahead due to the conditions and was quite pleased to follow someone I have had this in fog driving, exactly the same , pulls out to overtake, and finds he is totally blind due to the fog ahead Very happily follows a nice bright red tail light rather than strain the eyes driving at the front of the convoy Barsteward What I used to do was turn off the rear fog lamps, then drive a bit quicker, then return to my comfortable speed never to see them on my tail again :-) (with the rear fogs on) Jack McH