Williams copy 2-week old Renault design

Williams have copied Renault's new upper deck front wing design, just two weeks after the French team first raced it. For Renault it was part of their Barcelona aerodynamic package that lifted the team's performance considerably. As marked in the image, the new wing sports small endplates where the nose bridge and the downforce generating panels connect. Despite being less aesthetically pleasing, the solution allows to put a more aggressive angle of attack to the upper elements while helping to reduce the induced drag from it.
Note that this solution was only used by Rosberg and only during the race.