The flag goes green, Ocon and Grosjean are rthe first out on the track. Hartley follows shortly afterwards in the Toro Rosso.
Unlike yesterday, there will be no lunch break today to compensate teams for some of the lost running from last week.
Ferrari has made a late change to its schedule - Vettel is back in the car.
It's a big day for McLaren. The team completed just 38 laps yesterday after numerous stoppages, while most others accumulated pretty healthy mileage.
Good morning and welcome to another sunny day at the Circuit de Catalunya.