Sebastian Vettel and Ferrari are set to work through a race simulation this afternoon.

Vettel still holds the fastest time from this morning, and was asked at lunch whether he thinks the SF16-H is a winning car.

“Well that has to be seen,” he said, “but first impression was good and I think everything we built after that felt very positive. Overall I’m happy with the feeling in the car, difficult to say speaking about performance compared to the others, but ourselves we feel very happy with the step we’ve made.”

Earlier we asked you to vote for who you think will win the opening race of the season and, perhaps unsurprisingly, Lewis Hamilton is the clear winner, taking 57% of the votes.

Nico Rosberg, on medium tyres, gets his afternoon going with a 1:32.422 before improving with 1:29.736.

Mercedes are back up and running for the first time since that transmission problem ended Lewis Hamilton's running just before lunch as Nico Rosberg emerges for the first time today.

Right, here we go. Here's the very unofficial laps completed by driver in testing so far. Of course, this will change with some drivers out on long runs this afternoon.

Lewis Hamilton (Mercedes) 638

Nico Rosberg (Mercedes)  586

Max Verstappen (Toro Rosso) 534  

Kevin Magnussen (Renault) 509  

Felipe Nasr (Sauber) 455  

Valtteri Bottas (Williams) 445  

Carlos Sainz (Toro Rosso) 439

Sebastian Vettel (Ferrari) 400

Daniel Ricciardo (Red Bull) 395  

Kimi Raikkonen (Ferrari) 366

Felipe Massa (Williams) 362  

Daniil Kvyat (Red Bull) 360  

Nico Hulkenberg (Force India) 357  

Fernando Alonso (McLaren)  333  

Jenson Button (McLaren) 321  

Marcus Ericsson (Sauber) 318  

Sergio Perez (Force India) 282  

Pascal Wehrlein (Manor) 252  

Romain Grosjean (Haas) 252  

Jolyon Palmer (Renault) 210  

Esteban Gutierrez (Haas) 192  

Rio Haryanto (Manor)  179  

Alfonso Celis (Force India) 133

As the Force India is recovered, here is what Sebastian Vettel had to say about the halo head protection he tested this morning: 

“I think first of all to go round is OK, you can see what you need to see. I think we can improve the system in terms of aesthetics, and also in terms of how much visibly is in your way. I tested it in the simulator and I think we will see evolutions of it very soon.

“In principal, I agree it doesn’t look very nice. It’s not the picture you are used to for Formula 1 for a long time. But equally if it helps increase the safety and helps saving lives… There would be at least two drivers in the last four years that I remember would still be around, Henry Surtees and Justin Wilson, if we had this type of system. I think it can be as ugly as possible - nothing justifies not having these guys around any more.”

Red flagpublished at 14:01 Greenwich Mean Time 4 March 2016

14:01 GMT 4 March 2016

Sergio Perez has stopped at Turn 10.

Sebastian Vettel emerges as Rio Haryanto gets in his first timed lap of the day - a 1:38.433 on soft tyres. He improves massively soon after, clocking 1:29.349, but it is not yet enough to lift him off the bottom of the timesheet.  

No text accompanying this tweet, but then you don't need any words when you look as awesome as Felipe Nasr.

There's not much happening on the track at the moment, by the way. Rio Haryanto has been out, as has Romain Grosjean. Felipe Massa has also recently joined them.

No sign of Nico Rosberg in the Mercedes yet. Race sim on the agenda once again for the afternoon?

Just for you Alan, I'll rustle one up this afternoon.