McLaren MCL33 nose and front wing 1 / 19 Photo by: Mark Sutton A close-up view of the triple-inlet nose being run for the first time this weekend.

McLaren MCL33 nose and front wing 2 / 19 Photo by: Mark Sutton The complex front wing on the MCL33.

McLaren MCL33 technical detail 3 / 19 Photo by: Mark Sutton A close-up of the new turning vanes adopted by McLaren this weekend. Also note how the narrowing of the nose exposes more of the lower chassis inlets.

McLaren MCL33 4 / 19 Photo by: Edd Straw Alonso's MCL33 is painted with flo-viz to check the bargeboards and associated aerodynamic paraphernalia is acting as expected. Also note the inclusion of a new deflector panel, which has sprouted up from the floor’s axe-head.

McLaren MCL33 detail 5 / 19 Photo by: Giorgio Piola New deflector panels include a tall, forward element connecting the previous two panel configuration to the floor’s axe-head.

McLaren MCL33 rear detail 6 / 19 Photo by: Giorgio Piola A close-up of McLaren's new diffuser in Spain which features a revised central section with several perforations.

Haas F1 Team VF-18 7 / 19 Photo by: Mark Sutton Haas mechanics remove the entire halo structure from their car during free practice, note use of a boomerang winglet rather than small vortex generators.

Ferrari SF-71H rear diffuser detail 8 / 19 Photo by: Mark Sutton Ferrari painted flow-viz on the SF71H’s diffuser during Free Practice to ascertain whether the more squared central section scheduled to be used this weekend is working as expected.

Ferrari SF71H with mirrors on halo 9 / 19 Photo by: Giorgio Piola The FIA's Charlie Whiting takes an interest in Ferrari's new halo-mounted mirror and winglet solution.

Ferrari SF71H with mirror on halo 10 / 19 A rearward shot of the new halo mounted wing mirror and winglet combo being used by Ferrari this weekend.

Ferrari SF71H 11 / 19 Photo by: Giorgio Piola An overview of the Ferrari SF71H as it is pushed down the pitlane.

Red Bull Racing RB14 12 / 19 Photo by: Giorgio Piola Red Bull’s new slotted bargeboard solution and revised leading floor edge which now features six strakes rather the three.

Red Bull Racing RB14 rear floor 13 / 19 Photo by: Giorgio Piola Slotted floor ahead of the rear tyre features eight slots and one enclosed hole.

Red Bull Racing RB14 with aero sensors 14 / 19 Ricciardo's RB14 with a pair of Kiel probe arrays mounted behind the front wheels, which are used to collect data on the new parts that have been installed this weekend.

Mercedes AMG F1 W09 rear brakes 15 / 19 Photo by: Giorgio Piola A look at the complexity of the brake duct fins and outer diffuser channel on the W09.

Mercedes-AMG F1 W09 front suspension detail 16 / 19 Photo by: Mark Sutton The W09’s front suspension, note the new vertical fin mounted atop the already raised wishbone akin to the solution used by Sauber since the start of the season.

Williams FW41 steering wheel 17 / 19 Photo by: Mark Sutton Williams’ butterfly-shaped steering wheel which means the display is mounted behind on the dashboard.

Lance Stroll, Williams FW41 18 / 19 Flo-viz applied to the floor to ascertain the airflow conditions on that particular section of the car.