Barcelona third 2015 test Test day two

20:16 Here's the full report from today's session:

Rosberg puts Mercedes clear out front

Thanks for your company on AUTOSPORT Live today, we'll see you back here around 8am tomorrow morning.

20:07 Our full summary of the day's action will be available in just a few minutes, and there will be plenty of reaction news on our pages through the evening too - as well as KARUN CHANDHOK's answers to your questions about test form so far.

There are just two more days of pre-season running to go, so expect the clearest hints of 2015 form so far over the weekend - and as ever you can follow it all with AUTOSPORT Live from 8am UK time each morning.

We'll also have CRAIG SCARBOROUGH technical analysis of the latest car upgrade, more from Chandhok at the trackside and a couple more free features for you to enjoy.

20:04 And here's the final lap count:

Vettel - 143
Maldonado - 140
Nasr - 141
Verstappen - 139
Rosberg - 106
Button - 101
Bottas - 90
Kvyat - 84
Hukkenberg - 77

20:02 Here's the final times:

1 Nico Rosberg Mercedes 1m22.792s
2 Valtteri Bottas Williams 1m23.995s +1.203
3 Felipe Nasr Sauber 1m24.071s +1.279
4 Sebastian Vettel Ferrari 1m25.339s +2.547
5 Jenson Button McLaren 1m25.590s +2.798
6 Pastor Maldonado Lotus 1m26.705s +3.913
7 Max Verstappen Toro Rosso 1m26.766s +3.974
8 Daniil Kvyat Red Bull 1m26.965s +4.173
9 Nico Hulkenberg Force India 1m28.412s +5.620

20:02 That brings us to the end of the day.

20:01 Almost looks like the front wing is damaged or out of place, from the questionable TV image quality.

20:00 The Lotus has stopped at the pit entry

20:00 That leaves us with Maldonado, as Vettel has flashed past the CCTV location.

20:00 Or Hulkenberg, who had set a personal best through the first two sectors.

19:59 It's not Rosberg, Nasr or Vettel

19:59 Another red flag.

19:58 He improves again, to a 1m28.412s as we enter the final 90 seconds.

19:57 The other Nico, Hulkenberg, has improved to a 1m28.785s.

19:57 Or not, he's rejoined the circuit immediately.

19:56 Rosberg pits, likely calling it a day with 3 minutes left on the clock.

19:55 We've got five minutes remaining, and Rosberg, Nasr, Vettel, Maldonado, Kvyat and Hulkenberg on track.

19:52 We're on again, with seven minutes left on the clock.

19:49 The truck's now leaving the scene of Button's stoppage.

19:47 Taking a while to get the McLaren onto the back of the truck. We'll probably go green again with about 10 minutes to go. Currently 13 on the clock.

19:44 Speaking of endings, Williams has taken an early mark.

@WilliamsRacing "With 20minutes left of the day we have completed our programme so car is being prepped ready for tomorrow."

19:43 Still, a big day for McLaren-Honda. Button will end the day having completed 101 laps.

19:43 The circuit's feed confirms the car is stopped between Turns 7 and 8.

19:41 Looks like it's the exit of Turn 7, but it's hard to tell from this angle on the CCTV.

19:39 The McLaren-Honda has stopped on the circuit. They were so close to a trouble-free run.

19:38 It's Button

19:38 Red flag.

19:37 Nasr has also headed out onto the track. He's currently third after his run on softs before lunch.

19:36 It's complete, but through pitlane rather than the start-finish straight. Stops in the pitbay for a few seconds then goes on his merry way again.

19:34 This will be Button's 100th lap for the day. Big recovery.

19:34 Button, Maldonado and Kvyat have all just left pitlane, as the only cars on track.

19:33 We saw some late runs on soft and super-soft rubber last night, will be interesting to see if anyone does the same today.

19:33 We're into the final half an hour of the day. Air temperature is still 12.6C - it's been around that all day - but the track temperature has dropped to 15.6C, having been up over 25C a couple of hours ago.

19:29 Talking about good days, Force India are having a stunner. Nico Hulkenberg has clocked up 73 laps in the new car, which only started running properly after lunch. That's only four shy of Daniil Kvyat, who has been running since the start of play.

19:27 McLaren and Jenson Button are closing on their first century in pre-season testing. Button is out and about and currently on lap 96. At last, the Woking-based team seem to have had a good day.

19:25 So as it stands, we've got Rosberg out on the mediums, along with Vettel, Button, Maldonado, Kvyat and Hulkenberg.

19:21 After witnessing Rosberg's blistering run trackside, KARUN CHANDHOK suggests it's not all doom and gloom for Mercedes' rivals.

"I was out watching Rosberg's quail run through Turns 7, 8 and 9 and it looked like a properly quick, committed lap. The car was working well.

"I still think that while his lap was seven-tenths faster than Massa's yesterday, the track's had another day of rubber. So I would argue that Williams could probably get within three or four tenths of that time. "

19:15 No, he's back on the medium.

19:14 Rosberg has left pitlane for what could be his third run on the softs. Vettel, maldonado, Kvyat and Hulkenberg are also out at the moment.

19:11 Maldonado is back on track following a brief visit to the pits. It was a car KARUN CHANDHOK noticed while trackside this morning...

"The Lotus looks very edgy, very nervous to drive. I think the drivers are going to be earning their money again this year, unless they can find a solution to make it more comfortable."