I was driving on a road in the snow (for locals, the road up to the CSB towards Bristol), in the front was a small van with a trailer who was going all over the place too fast for the conditions. Behind was a person in an old small car driving far too close and trying to intimidate me into speeding up, I was driving slower than usual due to conditions) and had about 4 car lengths between me and the trailer (more than I'd usually have due to road conditions). The van in front braked as he approached a small queue .
I slowed down and the CF behind me put his lights on full beam and set his horn going because he nearly drove into the back of me and proceeded to drive behind me with lights flashing on full beam and intermittently sounding his horn for the next half mile before he turned off.