The lap times are continuing to tumble at the Circuit de Catalunya as Lewis Hamilton becomes the first driver to drop into the 1.18s region.
But first there was news of a driver change at Ferrari, with Kimi Raikkonen feeling under the weather.
— Scuderia Ferrari (@ScuderiaFerrari) March 7, 2018
Fernando Alonso was one of the first drivers to emerge from the garage, looking to atone for a dreadful day on Tuesday for McLaren as they suffered multiple breakdowns.
The Spaniard was the early pace-setter and one of seven drivers who had improved on their pre-season personal bests within the first couple of hours of the morning session.