Spotted this one on the way to work, perhaps from my area turned off at Tollbar roundabout…. Also need to apologies for chasing it in my Z4, as the RS was at home today…. Well had to find out how my two cars compared…. the Z did quite well actually 
Magnetic Grey with all the best bits
FPM375/COBB/MSD- Quaife LSD, DSC+Tractive Suspension, HJS200 cell sports cat and MT Cooler. Sync3 upgrade.
Was UK seller for DSC & Tractive Active suspension !!!