No done it, but im near Chav city for all the bling (ahem!) saxos with big bits o plastic, and im quite well known for bein a speed junkie.
Heard about some races for cash round that way (we r near the M74 and M8) but anyone i ever challenged to a race from glasgow to edinburgh shat out of it (Midnight racer stylee......150mph @4am on a sun night..lol)