Toro Rosso are getting ready to send Daniil Kvyat back into the mix.

He hasn't been out since bringing out the red flag when he stopped on the circuit around 90 minutes ago.

Kevin Magnussen and Pascal Wehrlein are also on the track now.

It's like the old days as former Williams team-mates Valtteri Bottas and Felipe Massa head out onto the track. 

Massa is stilling propping up the timesheet with Bottas, who is on 58 laps for the afternoon, is P8.

The recovery truck driver has earned their money today.

Jolyon Palmer's Renault is removed and we are back under way with just over one hour to go.

Denise Murdoch: Why all the ongoing Fernando hate? 10 years ago was also LH's fault. Fernando also deserves a fast car to be on the podium .

Palmer came to a stop at Turn 10 just after reaching a half century of laps for the day.

Red flagpublished at 15:41 Greenwich Mean Time 9 March 2017

15:41 GMT 9 March 2017

The fourth flutter of the red flag today and it's for Jolyon Palmer's Renault. 

We've talked a lot about McLaren and Honda but Renault have certainly had their issues in testing.

F1 journalist Dan Knutson in Barcelona: The tyres have been holding up pretty well. Yesterday, Sebastian Vettel did 33 laps [half a race] on the soft compound, although his lap times did drop off on the last nine laps. Lewis Hamilton completed 20 laps on a scrubbed set of the ultra softs. It’s looking like the drivers’ predictions of one-stop races might come true.

Having said that, Vettel has just completed his grand prix distance today, during which he pitted twice, using softs, softs and mediums.

Michael: Alonso's been the biggest beneficiary of preferential treatment the sport has seen since Schumacher. He is anti-competition and likes having his teammates nobbled so they can't mount any kind of challenge. He should be thankful that Ferrari made him #1 because they gave him 2 title contending years in 2010 and 2012. 

LH vs FA would be fantastic. Merc don't want FA though because of 2007.  

Felipe Massa topped the timesheets on Monday but pace is clearly not on the top of Williams agenda today. He's currently propping up the timesheet with a 1:25.080 he did on softs.

The Brazilian has completed 36 laps so far this afternoon. Lance stroll did 85 this morning.

Esteban Ocon makes it 100 laps for the day. It's been a very good day for Force India. 

Image source, Getty Images

At 15:32 GMT I asked you to name the driver behind the swirly picture and it is indeed Mario Andretti.

Mario Andretti voiced his character in the animated film Cars but Fernando Alonso did the voice for the Spanish version of the film.

Well done Will Rousseau, first to get it correct.

Michael Simmons: David Attenborough has seen a glimpse of the black & orange MCL32 doing its usual dart from cover then retreating back to its den.

With two hours remaining on the penultimate day of testing, Stoffel Vandoorne finally returns to the track for the first time since before lunch in the McLaren.

1) Sebastian Vettel (Ferrari) - 1:19.024 - ultra-softs 

2) Lewis Hamilton (Mercedes) - 1:19.352 - ultra-softs

3) Esteban Ocon (Force India) - 1:20.161 - ultra-softs

4) Daniil Kvyat (Toro Rosso) - 1:20.416 - super-softs

5) Kevin Magnussen (Haas) - 1:20.504 - ultra-softs

6) Daniel Ricciardo (Red Bull) - 1:20.824 - softs

7) Stoffel Vandoorne (McLaren) - 1:21.348 - ultra-softs

8) Valtteri Bottas (Mercedes) - 1:22.038 - softs

9) Jolyon Palmer (Renault) - 1:22.418 - softs

10) Pascal Wehrlein (Sauber) - 1:23.208 - softs

11) Marcus Ericsson (Sauber) - 1:23.330 - softs

12) Lance Stroll (Williams) - 1:24.863 - softs

13) Felipe Massa (Williams) 1:25.195 - softs 

Image source, Getty Images

Sebastian Vettel is well into his race simulation at the moment. He's just surpassed 100 laps for the day with his latest a 1:24.018 on medium tyres.

An improvement for Kevin Magnussen as a set of ultra-softs helps the Haas to a 1:20.504. They stay fifth but that's their best time in testing so far.