Redesigned mirror support on BGP001
Since Spain, Brawn is introducing updates all over its car, some smaller than others. At Monaco the BGP 001 featured updated mirror supports. Up to now, the team was running a twin element support while the new version is a much thicker aerofoil. Such in-season change of a previously simple element marks the team's search for performance improvement in areas where aerodynamic development is still allowed.
There also is a new fin just above the bargeoard, i think that was allowed as you couldnt see it from above by these supports