SILVERSTONE, July 3, 2015:
The German, 10 points behind double world champion Hamilton after eight of the season’s 19 races, lapped with a best time of one minute 34.274 seconds on a bright and hot morning at Silverstone.
Rosberg, winner of three of the last four races, had sat out much of the session as mechanics changed his car’s gearbox due to a hydraulic fault that stopped him on track with just five laps done.
He had time for only 12 laps once the car had been fixed, compared to Hamilton’s 26, but he made up for lost time by getting quickly up to speed.
Hamilton, who can expect to have most of the support from an expected 140,000-strong crowd on Sunday, had an early spin at Stowe without consequence.
Honda-powered McLaren’s miserable run of form continued with Fernando Alonso and Jenson Button 17th and 18th respectively, after spending most of the session in the garage, with only the Manor Marussia drivers slower than them.