McLaren MP4-31 - new front wing Only Jenson Button had this new-generation front wing, produced by ex-Red Bull aerodynamicist Peter Prodromou. The biggest changes are the much wider flat section beside the endplate (underlined in yellow - compare with the previous version inset) and the big cut (yellow) in the endplate itself. Note that instead of having separate small flaps there are wider chords flaps with a slot (red arrows) in the area close to the centre. Fernando Alonso stuck with the previous front wing, which would have provided the team with useful additional data on the two designs’ relative performance. Both drivers raced with the new brake ducts tested on Friday morning by Button.

Ferrari SF16-H - asymmetric front brakes Ferrari was among the teams with bigger front brake ducts in Spain. Not only that, they used an asymmetric layout with the three egg-shaped openings seen here on the ‘cake tin’ present only on the right side of the car. These aid the passage of heat from the brakes to the tyre, and helped balance temperatures with the left-front tyre - the one which does the most work around Barcelona.