We've got our second red flag of the day and this time it is Nico Rosberg's Mercedes which is responsible.

Image source, Williams

Following snow shots of Red Bull's Milton Keynes base and Mercedes HQ in Brackley, I bring you the outlook over at Grove where Williams are based. , external

McLaren report that they have stopped running to grab a spot of lunch. Just over four hours and 20 minutes remain of today's session.

Fernando Alonso:, external Encouraging morning here at the test! 32 laps. We keep learning about the car!

Kimi Raikkonen dips into the 1m24s with a 1:24.357, four tenths quicker than Mercedes' Nico Rosberg. Nice little tussle at the top of the timesheets between these two, trading lap times over the last hour or so.

Image source, Getty Images

Sauber have stopped for a spot of lunch, with Felipe Nasr currently sixth fastest, 9.254 seconds off the pace. The Brazilian rookie, who had a spin this morning, has completed 30 laps.

F1 journalist Dan Knutson in Jerez: They are changing the Renault engine in Daniel Ricciardo's Red Bull. He has done only five laps so far today. It's obviously not a routine scheduled change because the team would have done that last night.

"Meanwhile, Fernando Alonso headed off to the McLaren hospitality unit, so his car is out of action for at least a short time. He has now completed 32 laps."

Why have we seen so little of the Red Bull this morning? Well I have the answer coming up for you...

Image source, Silverstone

Earlier, we published an image of a snow-covered Brands Hatch. Over at Silverstone,, external there's been a dusting of the white stuff, too. It's just as well testing is taking place in southern Spain, eh...

BBC F1 pit-lane reporter, external Tom Clarkson: Found Esteban Gutierrez watching - and signing - at the chicane.

Here are the day's headlines:

• Nico Rosberg sets the pace in the Mercedes as the track dries in Jerez

• 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

Image source, Getty Images

Nico Rosberg back on top now, the Mercedes driver clocking a 1:26.064, with Toro Rosso's Carlos Sainz Jr slotting into second, just 0.003 seconds adrift. Kimi Raikkonen is third now, two tenths off the pace in the Ferrari.

McLaren's Fernando Alonso heads out for a single lap before heading back to the pits.

Meanwhile, Kimi Raikkonen goes second in the Ferrari with a 1:27.093 and then moves into top spot by breaking into the 1m26s.

The Finn is now two tenths quicker than Nico Rosberg's Mercedes, with Carlos Sainz Jr 1.4 seconds further back.

And having just said it's been a while since we've seen the Williams, Felipe Massa - an 11-time race winner and the 2008 world championship runner up - pops out for a spin.

Mercedes' Nico Rosberg improves the benchmark time to a 1:26.746, 1.129 seconds clear of Toro Rosso's Carlos Sainz Jr.

We've seen very little of the Williams of Felipe Massa and Red Bull's Daniel Ricciardo today. The pair have completed just a handful of laps.

Image source, McLaren

McLaren:, external Fernando pits after getting some solid laps under his belt. #McLarenHonda is back on the leaderboard. #Jerez

Image source, Getty Images

The times are tumbling with Nico Rosberg improving his leading time to a 1:27.073 with Carlos Sainz Jr popping into second in the Toro Rosso, 0.802 seconds adrift.

Kimi Raikkonen's time at the top doesn't last long as Nico Rosberg pops in a 1:27.400 to set the fastest time with a little under three hours of the session completed so far.

Kimi Raikkonen goes quicker still with a 1:28.137 in the Ferrari with Mercedes' Nico Rosberg closing the gap to just 0.082 seconds.