The other week I had an incident where a bloke chased me for about 8 miles. The whole thing was started off by me changing lanes to the left and preventing matey from undertaking a line of traffic on a roundabout[1]. During the whole episode he tailgated for about 1/4 mile, pulled alongside and swerved at me twice, swerved across two lanes of traffic[2], attempted to block my path and got out (being a bit shouty), chased me again performing some ludicrous overtakes (one involving an oncoming bus). From the way he was driving he was furious over something, and all reason appeared to be on leave. I managed to lose him round a twisty bit that I know well. Had I not had this option what the hell are you supposed to do? I was in the car, he was in a much more powerful car [3]. Without local knowledge I doubt I'd have been able to lose him, and considering the lengths he was going to to stop me I'm not sure proceeding through the morning commuter/school jams to the local police station would've gotten me very far. I've now got matey's registration. He ended up behind me in an exact copy of the original situation, and sure enough he tailgated me, then as soon as we'd left the junction I let him go where he nearly drove into the back of another car after flooring it to get past. Happily, this morning he just drove off. So, what's the procedure in this? The only thing I did to make the situation worse was to mouth "very mature" with a thumbs up after the swerving bit. I apologised at the start, even though I thought it was his fault. What I did worked, but there's no lesson to be learned for the future. I'm interested in the BHaLC, police/legal and any contrasting opinions. [1] I was turning right on a roundabout and positioning for my exit. I'd passed matey as he was stationary in his junction. When I checked it was clear, so I signalled and moved. I might have missed something but the most I'd give him is 50/50. [2]As I was leaving a 2 lane motorway he went from lane 2 to lane 1 on the sliproad, cutting up two lanes of traffic. [3] Lexus LS400 according to the RAC, had a v8 badge on the back.