On the way home on the M6 last night I was overtaken by a silver Yaris (couldn't make out numberplate as it was filthy or they would have been reported), who then decided to slow right up in the fast lane. I carried on at the same speed, pulled into the fast lane, hoping he would notice and move over for me to overtake. After some time he didn't so I flashed lights once, still didn't. I moved over to undertake (motorway was pretty quiet), so he sped up, so did I etc. As I was pulling up alongside him, he drifted across in front of me and slammed the brakes on, at which point I had to swerve into the (luckily empy at this point) slow lane to avoid him. Another heart in mouth moment, so I backed right off, down to about 50 to recover. Why do tosspots do this?!? He could have fecking killed me :bang: 