Postpublished at 13:10 Greenwich Mean Time 3 February 2015
After a spot of lunch, Nico Rosberg is back out in the Mercedes. A little over three hours of today's session remain.
Summary
Nasr takes Sauber to the top of the timesheets
McLaren get mileage but end the day early
Nasr spins, bringing out first red flag of the day
Rosberg stops on track
Lotus hampered by telemetry trouble
Eight teams in action, with Force India absent
Get involved using the #bbcf1 hashtag or by texting 81111 (UK only)
Postpublished at 13:10 Greenwich Mean Time 3 February 2015
Postpublished at 13:08 Greenwich Mean Time 3 February 2015
McLaren add: "We can replace those components ahead of running tomorrow. The issue was promptly spotted by Fernando on an out-lap - so quick to trace."
McLaren end day earlypublished at 13:08 Greenwich Mean Time 3 February 2015
It was all going so well for McLaren this morning, but the team say their day is done. "We've had a loss of cooling water pressure & have removed the power unit for inspection," tweet the team. "That's a long process, so it ends today's running."
Postpublished at 12:51 Greenwich Mean Time 3 February 2015
Pace-setter Felipe Nasr dives back into the pits, as he approaches the 50-lap mark. That leaves Felipe Massa's Williams out on track with Toro Rosso's Carlos Sainz Jr for company.
Postpublished at 12:48 Greenwich Mean Time 3 February 2015
F1 journalist Dan Knutson in Jerez: "Red Bull magnate Dietrich Mateschitz has arrived at the circuit. He and team principal Christian Horner strolled down to the Toro Rosso garage for a chat."
Postpublished at 12:40 Greenwich Mean Time 3 February 2015
Image source, Getty ImagesFelipe Nasr is one of three rookies on the grid this season and arrives in the sport having finished third in the GP2 series, collecting four wins along the way.
The 22-year-old Brazilian gained experience as Williams' test driver in 2014 and lists the 2011 British Formula Three and 2009 Formula BMW Europe titles under his achievements.
Nasr goes quickestpublished at 12:37 Greenwich Mean Time 3 February 2015
Image source, Getty ImagesA Sauber goes quickest! Felipe Nasr clocks a 1:24.052, which is 0.022 seconds faster than the Ferrari of Kimi Raikkonen.
Postpublished at 12:33 Greenwich Mean Time 3 February 2015
Mercedes report that an engine shutdown brought Nico Rosberg's last run to a halt, adding the crew are looking into it now. After a faultless opening day at this test, a few niggles have started to creep into the world champion's programme.
Postpublished at 12:28 Greenwich Mean Time 3 February 2015
Kimi Raikkonen, Felipe Nasr and Felipe Massa are back in the pits, leaving Carlos Sainz Jr and Pastor Maldonado with the track to themselves.
Postpublished at 12:20 Greenwich Mean Time 3 February 2015
Image source, McLarenMcLaren:, external Back at a snowy MTC... Tyre warmers needed we reckon.
Headlinespublished at 12:13 Greenwich Mean Time 3 February 2015
Here are the day's headlines:
Kimi Raikkonen sets the pace for Ferrari after track dries in Jerez
Nico Rosberg closes on a tally of 100 laps, but losing time after stopping out on track
McLaren finally get some laps on the board, with Fernando Alonso managing more than 30
Felipe Nasr spins, bringing out the first red flag of the day
Lotus delayed because of telemetry issues
Postpublished at 12:12 Greenwich Mean Time 3 February 2015
Ferrari's Kimi Raikkonen improves on his leading lap time with a 1:24.074, 0.696 seconds clear of Mercedes' Nico Rosberg, who is busy having lunch.
Get involvedpublished at 12:11 Greenwich Mean Time 3 February 2015
Alex Withington:, external At last some progress for @McLarenF1 We know it's testing but after 4 stop/start/stop days those 32 laps are a huge relief to us fans.
Postpublished at 12:11 Greenwich Mean Time 3 February 2015
Honda Racing F1:, external 32 laps. Always testing, always learning. Lets see what this afternoon brings.
Postpublished at 12:10 Greenwich Mean Time 3 February 2015
Image source, MercedesMercedes:, external Pasta, salmon and an engineering debrief - isn't that how everyone takes their lunch? #BackToWork
Postpublished at 12:09 Greenwich Mean Time 3 February 2015
Kimi Raikkonen is out and about in the Ferrari, along with the Sauber of Felipe Nasr, who is back in the car after a spot of lunch.
Go! Go! Go!published at 12:06 Greenwich Mean Time 3 February 2015
And we're back under way in Jerez!
Postpublished at 12:00 Greenwich Mean Time 3 February 2015
So while we wait for the marshals to retrieve the stricken Mercedes, let's have a recap.
Kimi Raikkonen is quickest with a 1:24.357, 0.413 seconds ahead of Mercedes' Nico Rosberg. Carlos Sainz Jr is third, ahead of Pastor Maldonado, Daniel Ricciardo, Felipe Nasr, Fernando Alonso and Felipe Massa.
Postpublished at 11:56 Greenwich Mean Time 3 February 2015
Mercedes:, external So @nico_rosberg is catching a lift back from T10 it seems: he'd better not be late for lunch. We'll keep you posted on his progress..
Postpublished at 11:52 Greenwich Mean Time 3 February 2015
Image source, Force IndiaForce India:, external It seems the whole of F1 is fascinated with the snow at home, so here is a shot of our HQ under a white blanket...