F1 testing updatepublished at 13:23 Greenwich Mean Time 20 February 2015
Andrew Benson
BBC Sport chief F1 writer
"Lewis Hamilton missed his day's running on Thursday through illness, but he is back at the track and is now out in the car.
"Mercedes will have done this on fairness grounds - it means that over the first two days of the test Hamilton and Rosberg will have had about the same amount of running at half a day each. Then they run a day each over the weekend."