for full FP1 times.
Nico Rosberg set the fastest time during a disjointed FP1 session for a British Grand Prix which was halted for 15 minutes following an accident for Felipe Massa.
The two Mercedes drivers predictably led the way, with Rosberg posting a best time of 1:35.424 to head team-mate Lewis Hamilton by 0.731s. Hamilton had been improving at one stage in the session but saw his lap ruined by yellow flags, but Rosberg himself didn't enjoy a trouble-free session as an ERS issue limited his pace for a while.
It was a nightmare first 30 minutes for Williams, with Susie Wolff – making her FP1 debut – stopping on track after just four laps with an oil pressure problem. Then just six minutes later, Massa lost control of his car on the exit kerb at Stowe and hit the tyres on the inside of the track at high speed, heavily damaging the car and bringing out a red flag.
The crash was remarkably similar to one Massa had when driving for Ferrari in FP2 last year, hitting the wall in exactly the same place having lost control at the same corner.
Ferrari itself was having another strong Friday morning, with Fernando Alonso third quickest and the only car within a second of the two Mercedes. Kimi Raikkonen was fifth – 0.3s off his team-mate – as the two Ferraris sandwiched Daniel Ricciardos Red Bull. Sebastian Vettel was sixth quickest as the reigning constructors' champions looked more competitive than Austria.
The majority of team-mates were closely matched, with Jenson Button, Daniil Kvyat, Jean-Eric Vergne and Kevin Magnussen rounding out the top ten.
Pastor Maldonado also had a tough session as he was told to stop his Lotus at the end of the pit lane immediately after leaving the garage. While the car was able to be recovered, Lotus couldn't get Maldonado back out in the session as he completed just two laps.
There was more trouble for a Renault-powered team at Caterham as Robin Frijns completed just 11 laps having been consigned to the pits when the team discovered an electrical problem which appeared to be causing a misfire in the power unit. Marcus Ericsson had been having a more productive day in the other car but then had a high-speed spin at Becketts and beached his car when trying to rejoin the track.
Of the other reserve drivers getting some track time in FP1, Dani Juncadella was 14th quickest for Force India, one place ahead of Giedo van der Garde in the Sauber.