Mercedes:, external RADIO: "What are we waiting for?!" Someone's keen...

James Grimwood:, external McLaren's woes don't worry me. Red Bull were in a similar position last year and ended up winning races.

Justin Regan:, external If Red Bull can get close to matching top speeds then we have a competition on our hands. Both Dan's have proven they have the talent.

David Tyrrell:, external McLaren may not be doing loads of laps but it's better to work out the problems than skip over them.

Andrew Benson
Chief F1 writer

Image source, Getty Images

"Felipe Massa takes over the Williams on Tuesday after two quietly successful and productive days' work by team-mate Valtteri Bottas. It's early, of course, but the signs are Williams have had a solid winter and built nicely on the foundations of 2014, when they leapt back up to the front of the field, arresting a decade of decline. 'We've had zero problems with the car and there is a good feeling,' Bottas said."

We're still under red flag conditions as we wait for marshals to recover the stricken Sauber.

McLaren:, external "Some laps already under our belt this morning - feels like progress."

The Sauber driver spun and is now in the gravel. A recovery truck is on its way...

Oh. That run comes to an abrupt end as Sauber's Felipe Nasr has brought out the red flag. Woops.

And it's a third run for McLaren! A third run!

Image source, Getty Images

Just Felipe Nasr's Sauber and the Toro Rosso of Carlos Sainz Jr out on track at the moment.

Mercedes:, external Overnight dampness just about starting to clear on track - @nico_rosberg goes for the slick look :)

Andrew Benson
Chief F1 writer

Image source, Getty Images

"Monday was not a good day for Red Bull. Daniil Kvyat went off on an out lap early in the morning and damaged the front wing mounting pillars. There were no spares, so the team were forced to run without a front wing for the rest of the day, which meant only systems checks were possible.

"A slightly chastened Kvyat admitted: 'These things happen and they happened to me at the wrong moment. I was going very slowly but sometimes it is not even enough. Many factors. You don't spin many times on the out lap. One of the smallest incidents I had but one of the most costly ones.'"

F1 journalist Dan Knutson in Jerez: "As you can see from this photo from Monday, the Ferrari guys are using eight screens on wheels to hide the new car as it comes into the pits. They set up the screens on three sides, and then as soon as the driver pulls into the slot the mechanics quickly pull two of the screens around and completely enclose the car.

"Given that the Ferrari was the quickest car on the first two days of the test, perhaps the team has something worth hiding, although it's worth pointing out that they employed the same tactics in testing last year, too."

Image source, PA

Fernando Alonso takes his count to 10 laps before diving back into the pits. The lap times are nothing to write home about, but the Spaniard has now completed two runs in the McLaren and almost matched the tally he and team-mate Jenson Button achieved over the last two days combined.

Is this the day McLaren's 2015 season finally kicks into gear?

Fernando Alonso has headed out for a second run of the day in the McLaren, and again, he manages to do more than one lap. Progress at last!

Catch up on day two's action with this highlights video, which features an interview with world champion Lewis Hamilton.

Joe Jameson:, external More F1 testing today! Here's hoping that McLaren have a better day of it...

Andrew Benson
Chief F1 writer

"After a quite remarkable 157 laps by Nico Rosberg on the first day of testing for Mercedes, Lewis Hamilton experienced the team's first reliability hiccup on Monday with a water leak caused by a failed part. But it was a measure of the rate at which Mercedes have been knocking out the laps that Hamilton had already done 97 laps by the time the car stopped in the pit lane early in the afternoon session.

"'I got in a good amount of laps,' Hamilton said. 'I got a good feel for the car, back in quite quickly, so overall it was good.' He added that the car felt 'very similar to last year really, which is a good thing', but with more downforce. The year has started well for Mercedes, for whom Rosberg is back in the car on Tuesday."

Kimi Raikkonen breaks the silence as he heads out in the Ferrari. The Finn is joined by the two Felipes - Massa and Nasr in the Williams and Sauber respectively.

Image source, Getty Images

Red Bull have their wing back today, after Daniil Kvyat damaged the only one they had yesterday. A new one was flown in, but that meant Kvyat's running was severely hampered.

Daniel Ricciardo is in the car today and mentioning him means another excuse for us to use an image of their epic camouflage livery.

Still quiet on track. I suspect the teams are waiting for the track to dry out. So in the meantime, let's use this lull in the action to get some F1-related chat going.

Do you think McLaren can turnaround their fortunes? Have Mercedes already got this season tied up? Will Red Bull and Ferrari get closer?

Tweet us using the #bbcf1 hashtag or text 81111 (UK only). The floor is yours.