Asian guy with turban driving with elderly man with grey beard and turban in passenger seat. Drove up behind me in outside lane on M25 flashing lights, I was travelling at an acceptable speed passing traffic in all three lanes to my left with a car in front of me. I couldn't move over due to traffic on the inside, no one had a large enough gap behind the vehicle in front so I would have to slow in lane 4 and then cut someone up in lane 3 in order to move over. A Vauxhall Corsa then pulled out in front of me from lane 3 to 4 and I had to drop a little off my speed, which I did by letting off the accelerator and feathering the brake (very anxiously as his car was a car length or less behind at this point). The driver continued going nuts, now gesticulating and still flashing lights. The traffic opened up a few seconds later with lanes 2, 3 and 4 becoming clear. As I indicated and started moving from lane 4 to 3 he undertook me causing me to stop the lane change. He was abusing me and staring out of his side window. He then swerved back in front of me in lane 4, he was half a car length in front and brake tested me, although not very hard. I immediately slowed and started moving from lane 4 to 3 to 2 while he swerved in front of me still slowing. By this point I had opened a gap between us by slowing faster than him and he lost interest and sped off. I imagine most of the traffic behind slowed when they saw two cars weaving across the road.
Silly young boy driving around ,no attention given to other road users, blacked out civic and always smells of cannibus