Ferrari, Red Bull and McLaren are firing up for the first time in 2016 as they kick off a two-day wet weather tyre test for Pirelli at Paul Ricard.
The three teams have been selected to assist the tyre firm with mileage conducted in wet weather conditions ahead of the 2016 season, though they are only permitted to use 2015 specification cars.
Kimi Raikkonen, Daniel Ricciardo and Stoffel Vandoorne are on driving duties, with Sebastian Vettel and Daniil Kvyat taking over from the former two tomorrow. McLaren reserve Vandoorne gets two days in the car.
Despite the 'old' specification cars, Red Bull is running with a revised livery having taken erstwhile title sponsor Infiniti off its sidepods, in favour of a large Red Bull decal. It also has TAG Heuer branding on it ahead of a season that will see Red Bull's Renault's engines branded as the Swiss watchmaker.
Paul Ricard has been chosen as the test venue for Pirelli due to facilities that feature trackside sprinklers. Pirelli is using a relatively short 3.5km configuration, with drivers doing stints at intervals, before pulling in so the circuit can be doused again.
The weather is 'dry' but overcast.