Sometimes it's the smaller details that capture your imagination and shows the thinking out of the box mentality that it takes to design elements of an F1 car. The Williams FW36 sports wing mirrors with exactly that thinking.
In order to reel in the use of outboard mirrors that were more about aerodynamics than clear vision for the driver, the FIA adjusted the regulations several seasons ago to limit their position and the size of the mirror/mountings. Teams have since then of course used the wording in order to manipulate the mounting to create a component that gives an aerodynamic advantage. Williams have perhaps gone one step further here though, the mirror sits atop an elongated mounting that will undoubtedly condition the airflow heading toward the Sidepod, perhaps taking the place of the Vortex Generators that usually adorn the leading edge of it too.