Coming back from Trax this year I saw the snide f@ckers with no signs to pre warn. I hit the anchors with an indicated 120mph on the bus's speedo and my mate that was trying to keep up tore past despite my frantic waving
A few days later a NIP from the thames Valley Police came through and he'd been clocked at 103mph. He was offered 3 points and a driving awareness course
www.abd.org.uk is a good site to get info from and has links to places that may be of help to you