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As it happened: Test day three
By Glenn Freeman, Ben Anderson, Lawrence Barretto and Mitchell Adam
The live commentary has ended. No further updates will be posted.
07:55 Good morning and welcome to AUTOSPORT's live coverage of Day 3, of Formula 1's final pre-season test in Barcelona.

07:56 The early news is that it's cold. Actually cold, 3.4C at the moment, easily the coldest it's been over the four days.

07:56 A hotel room card came in very handy to scrape ice from the windscreen of the hire car this morning, but the good news is that the sky could not be clearer.

07:57 As with the first two days of the test, BEN ANDERSON, LAWRENCE BARRETTO and MITCHELL ADAM will bring you today's action.

07:57 It's almost time to get going, so here's a handy list of who we expect to be in action today:

Mercedes - Hamilton
Red Bull - Ricciardo
Williams - Massa
Ferrari - Raikkonen
McLaren - Magnussen
Force India - Hulkenberg
Toro Rosso - Sainz
Lotus - Grosjean
Sauber - Ericsson

07:59 @HondaRacingF1: "We're up bright and early for today's test. The focus is on different car set-ups."

08:00 Off we go - Massa, Grosjean, Raikkonen and Ericsson are the first out of the pits.

08:01 Ricciardo, in the Red Bull for the first time this week, also heads out.

08:02 As is generally the way in testing, Massa, Raikkonen, Grosjean and Ricciardo return to the pits after their installation lap.

08:03 Ericsson sticks with it for at least another tour of Circuit de Catalunya.

08:04 Grosjean heads straight back out, while Sainz has headed out for a sighter.

08:04 Ricciardo hit his marks perfectly as he came into the pits. After fiddling with a few buttons on his steering wheel, he accelerated away from the pit box and then stopped to be pushed back into the garage. The left rear of the car was splattered in flo-viz paint, with his mechanics using a screen to shield the back of the car.

08:05 ‏@Lotus_F1Team "Straight out as the track opens, @RGrosjean sporting an aero rake for his first run of the day"

08:06 Aero rakes and flo-viz paint will feature this morning in the cold conditions. Teams know the limits of what can be achieved each morning.

08:06 Hamilton and Hulkenberg, both out for the first time, are the only cars on tack.

08:08 Speaking of on track... many thousand miles away, Ferrari test driver Jean-Eric Vergne is bringing Formula 1 machinery back to a former grand prix venue this weekend - Adelaide. He's demonstrating a 2012 Ferrari during the Australian V8 Supercars season opener.

@JeanEricVergne "Awesome feeling for my first time in a #Ferrari to bring back the sound of F1 in #Adelaide :) ! @ScuderiaFerrari"

Jean-Eric Vergne, Ferrari, Adelaide 2015

08:09 Hamilton clocks the first time of the day, but it's nothing special - just a 1m35.843s on the medium tyres. He has the track to himself for now.

08:11 We've now seen eight of the nine cars set to run today. Only Kevin Magnussen is yet to appear. After a disastrous opening day, Friday was kinder to McLaren-Honda, with Jenson Button turning 101 laps.

Jenson Button: 100 F1 test laps for McLaren-Honda felt like 1000

08:13 Massa logs his first time of the day, a 1m27.271s, while Hamilton has improved to a 1m31.477s.

08:15 Hamilton hasn't wasted time getting down to business. He's on the sixth lap of his current run on the mediums already.

08:17 Mercedes made something of a statement yesterday, running the soft compound Pirelli for the first time. In the opening two tests, the team stuck to the medium and weren't a mile away from the pace of those on softs and super-softs.

Yesterday afternoon, that changed. Rosberg bolted on a set of softs and went a lazy 1.2 seconds faster than Bottas managed earlier in the day on the same compound.

Barcelona F1 test: Nico Rosberg fastest as Mercedes uses soft tyres

08:17 It's a short run for Felipe Massa, who dives back into the pits. That leaves Lewis Hamilton, Romain Grosjean and Kimi Raikkonen out and about on the Circuit de Catalunya.

Romain Grosjean, F1 testing 2015

08:21 Raikkonen slaps his first time on the board - a 1m29.035 - to go second quickest. Meanwhile, Hamilton's run continues. He's up to nine laps on the medium.

08:25 Hulkenberg, who took the 2015 Force India out for its first spin yesterday, pumps in a 1m29.624 to go third quickest, 2.3s off the early pace. Can the Silverstone-based team clock up another impressive haul of laps as they try to catch up?

08:28 Raikkonen improves to a 1m27.840s, 0.569s off the pace before retreating back to the pits.

08:29 The temperatures are starting to climb, albeit it very slowly. The air temperature has hit a balmy 4.8C while the track is up to 18.9C. Toasty.

08:30 Hulkenberg continues to circulate. With its compromised testing, getting 77 laps on the board during the car's first day was a very good return. Especially as it didn't run until the hour before lunch.

Nico Hulkenberg: Force India still up against it despite good debut

08:31 Hamilton's early run comes to an end, the Mercedes driver pitting after 14 laps on the medium tyre. That leaves Raikkonen, Ricciardo and Hulkenberg out and about.

08:33 Ricciardo clocks a 1m28.325s on his fifth lap of the day to do third fastest. Only Grosjean, Ericsson, Sainz and Magnussen have yet to set a time.

08:35 Ricciardo continues to improve, the Australlian now dipping down to a 1m27.911, 0.6s off the pace set by Massa.

08:37 Raikkonen, who is onto his ninth lap of this current run, is on the mediums while Ricciardo is rocking the hards on the Red Bull.

08:40 There's been no messing around in the first 40 minutes, with drivers keen to get clock up the miles early doors.

Here's the latest lap count:

Raikkonen - 15
Hamilton - 14
Hulkenberg - 12
Ricciardo - 9
Grosjean - 7
Ericsson - 4
Massa - 4
Sainz - 1

08:42 And for those reading on the mobile app, here's what the timing screen looks like:

1 Felipe Massa Williams 1m27.271s
2 Kimi Raikkonen Ferrari 1m27.840s +0.569
3 Daniel Ricciardo Red Bull 1m27.911s +0.640
4 Nico Hulkenberg Force India 1m29.449s +2.178
5 Lewis Hamilton Mercedes 1m30.841s +3.570

08:43 Hamilton is back out on the mediums and goes quickest with a 1m27.182s, 0.089s faster than Massa.

08:44 Hamilton's just improved again, a 1m26.110s.

08:48 Magnussen has just completed his first lap, which means we've seen all nine drivers in action today. He's got Hamilton, Massa, Grosjean and Sainz for company at the moment.

08:49 Hamilton heads in after a six-lap run on the mediums.

08:49 Our position above Red Bull's garage provides a good view of the different equipment and procedures of pitting during testing versus testing during a race.

Rattle guns and fuel hoses make way for jacks, leaf blowers and giant boards to - almost playfully - stop photographers taking pics of technical details. Except for this photo, the rear of the RB11 is packaged very tightly indeed.

08:52 Throughout winter testing we've been blown away by how many of you have joined us for our live coverage - never more so than at the weekend, too.

As a small appreciation of your dedication, here's a FREE feature previously only available to AUTOSPORT+ members, from ex-F1 designer and now our technical consultant GARY ANDERSON:

> FREE: Gary Anderson's blueprint for F1

08:54 A relative lull as we approach the end of the first hour, only Massa and Sainz - who is conducting some pitstop practice - on track at the moment.

08:59 Toro Rosso is running what technical director James Key told AUTOSPORT is an 'almost completely brand new' car this week.

Max Verstappen got his first taste yesterday and his first impressions were positive.

"I think we made a really good step, now we have to get more experience with the car. We did a lot of checks to see what we were doing on the car, we did a race simulation that was very promising so I am very pleased for that.

"It is better for the tyres, better to be consistent. Makes your life easier."

09:00 Ricciardo and Raikkonen have just made gains to now sit second and third. A 1m26.314s for the Australian, 1m26.532s for the Finn.

09:02 Here's the state of play at the end of the first hour...

1 Lewis Hamilton Mercedes 1m26.110s
2 Daniel Ricciardo Red Bull 1m26.314s +0.204
3 Kimi Raikkonen Ferrari 1m26.532s +0.422
4 Felipe Massa Williams 1m27.271s +1.161
5 Nico Hulkenberg Force India 1m29.449s +3.339

Lap count:
Hamilton - 20
Ricciardo - 13
Raikkonen - 21
Massa - 13
Hulkenberg - 16
Sainz - 11
Grosjean - 10
Ericsson - 5
Magnussen - 2

09:03 An early contender for 'fun fact of the day'...

@ToroRossoSpy "As @carlosainz completes lap 10 of day, it's 1000 laps in testing: 4573kms, nearly 35 Million @redbull cans in a row!"

09:05 Here's our first glimpse of 2014 McLaren race driver Kevin Magnussen returning to the cockpit today as he stands in for the recovering Fernando Alonso. Nice touch from the team to put the Dane's race number (20) on the car, too.

Kevin Magnussen, F1 testing 2015

09:06 And, right on cue, the Dane heads back onto the circuit. Currently on his fourth lap of the day.

09:10 We've also got Hamilton and Hulkenberg on track at the moment. They've both completed 21 laps so far this morning.

09:13 Temperatures are continuing to creep up. Air temp is now a positively balmy 6.4C (actually double our arrival temp) and track is up to 21.1C, as it receives a big dose of Vitamin D.

09:16 Hulkenberg and Hamilton have now pitted, as Massa heads out.

The Brazilian topped the opening day of running and Williams looks set to be Mercedes' closest challenger.

Here's BEN ANDERSON and KARUN CHANDHOK's take on its performance.

Williams starts to show its hand

09:16 Grosjean is also now on track in the Lotus, yet to log a Saturday laptime.

09:18 That's now been rectified, Grosjean logs a 1m30.964s. Massa, meanwhile, has improved to a 1m26.546s.

09:19 Ericsson has joined them on track. The Swede logged a day-high 122 laps on Thursday as he completed a race simulation. Sauber team-mate Felipe Nasr ran a similarly-busy programme yesterday.

09:21 Ericsson sets his first time of the day, it's a 1m29.602s. Grosjean is now in the low-29s, having turned a 1m29.191s.

09:23 That leaves Sainz and Magnussen as the only drivers yet to set a time.

09:29 It's the weekend, so we're not surprised to see a fair few more fans at the circuit today, particularly in the grandstand that straddles the pit straight and in those positioned around the final sequence of corners. As you can see from this pic, Mercedes are winning the battle of the supporters' flags.

Mercedes flags

09:34 Ricciardo has been out for run on the medium compounds, lapping consistently in the 26s. He completes a pass through pitlane then gets on with it again.

09:34 Hulkenberg and Grosjean are the other men currently on track.

09:35 Here's the current lap count:

Hulkenberg - 30
Hamilton - 24
Grosjen - 22
Raikkonen - 22
Massa - 22
Ricciardo - 21
Ericsson - 13
Sainz - 18
Magnussen - 5

09:37 Ricciardo dives back into the pits after a six-lap run on the mediums. His mechanics are ready and waiting with the cool air blowers and screen to shield the car from the one photographer lurking on the pit wall.

09:39 Magnussen has just headed back out. The Honda has a very distinctive note we can pick in pitlane from the media centre. 'Unrefined' is a word you might use, as development of the power unit continues.

09:42 His 2014 team-mate Button is here, rugged up and looking on. The former world champion was among those to touch on Mercedes' form during last night's media sessions.

"They are unbelievably quick and we are obviously a long way off, but we don't know what fuel everyone is running," he said.

Formula 1 rivals say Mercedes 'unbelievably quick' in 2015 testing

09:43 Grosjean pits for a nose change as Lotus continue their aero evaluations. That leaves just Ericsson, Hulkenberg and Magnussen out on track at the minute.

09:43 Hamilton has improved to a 1m25.714s on the medium.

09:47 Two laps later, he goes faster again, a 1m25.471s.

Lewis does appear to overshoot Turn 1 and use the run-off inside Turn 2 moments later, though.

09:51 Hamilton pits after a six-lap run on the mediums, his advantage at the top of the timesheets now 0.843s.

09:52 Another batch of runs have come to an end, with Massa currently the only car on track.

09:55 And now Felipe pits and we have an empty circuit.

09:57 Only momentarily, though, with Grosjean and Ricciardo heading out.

In Lotus' Friday media session, Pastor Maldonado spoke about the team's move from the Renault to Mercedes power unit, and the difference it has made.

"From the driving point of view, it's an easier engine.

"Compared to Renault there is more power, that's obvious, but it’s not the power difference. It’s how the engine is delivering the power, the engine is responding much better."

09:58 So far this morning, the likes of Ferrari, Mercedes, Williams and Red Bull have been focusing mostly on short runs of five-six laps. Massa's last run was five laps on the medium, bringing his tally to 27.

09:58 Grosjean improves, recording a 1m27.950s and moving into fifth.

09:59 Ricciardo also picks up the pace, joining Hamiton in the 25s, with a 1m25.941s.

10:01 Magnussen has set McLaren's first time of the day - 1m29.336s. Leaves only Sainz without an entry.

10:01 With two hours gone, here's the latest lap count:

Hulkenberg - 38
Hamilton - 30
Massa - 27
Grosjean - 26
Ericsson - 25
Ricciardo - 25
Raikkonen - 22
Sainz -18
Magnussen - 9

10:02 And this is how the laptimes look:

1 Lewis Hamilton Mercedes 1m25.471s
2 Daniel Ricciardo Red Bull 1m25.941s +0.470
3 Kimi Raikkonen Ferrari 1m26.532s +1.061
4 Felipe Massa Williams 1m26.546s +1.075
5 Romain Grosjean Lotus 1m27.950s +2.479
6 Marcus Ericsson Sauber 1m28.719s +3.248
7 Nico Hulkenberg Force India 1m29.277s +3.806
8 Kevin Magnussen McLaren 1m29.336s +3.865

10:06 If you fancy checking out a full gallery of Barcelona testing snaps to accompany AUTOSPORT Live and your morning cuppa, we can help.

Final Formula 1 pre-season test gallery.

10:07 Big improvement from Hulkenberg, a 1m27.404s on the medium. Fastest the new Force India has been in its brief history.

10:08 Magnussen is also out in the McLaren and has set several green sectors, but is yet to improve on his 1m29.336s.

10:08 Hamilton is the other driver currently enjoying the Spanish sun.

10:11 You can often spot team press officers when they enter the media centre. Not because of their uniforms, but because they're juggling two phones.

10:12 Magnussen is now down to a 1m29.028s.

10:15 He then brings the McLaren back into the pits. 17 laps on the board so far today.

10:16 BEN ANDERSON is down at Turn 1 and reports that Hamilton go it wrong and was forced to take to the escape road.

10:16 Ericsson, who has just moved to a 1m27.710s, and Sainz are the only drivers on track after Hamilton heads back down pitlane.

10:20 Ricciardo heads out in the Red Bull...

10:21 And Carlos Sainz Jr gets his first time on the board - a 1m27.823s, which is good enough for seventh quickest.

10:22 @SauberF1Team "Marcus is currently on a long-run #ME9 #F1"

10:22 BEN ANDRERSON is still in position at the opening sequence of corners and reports: "Carlos Sainz is struggling to keep the power down through Turn 3. The Spaniard had a big lift a lap ago on the exit and another more gentle one this time around."

10:24 Ricciardo improves to 1m25.879s on the mediums, but he stays second, 0.4s off the pace.

10:27 At the risk of putting a commentator's curse on the whole test, we've still only had four red flags since Thursday morning.

Two through Kvyat, one on Thursday at the end of pitlane and his Turn 1 stoppage yesterday, then late dramas for Button and Maldonado (who says his was part of a test they were doing on the car) last night.

10:27 More from BEN ANDRERSON: "Big lock-up for Sainz into Turn 1 and a massive moment for Ricciardo exiting three so he had to lift off."

10:28 Ricciardo brings a five-lap run on the mediums to an end, leaving just Sainz, also on the mediums, with the track to himself.

10:29 Hulkenberg is back on track in the Force India, which is nearing 50 laps for the day, to join Sainz.

10:31 On the topic of laps, here's the latest tally:

Hulkenberg - 46
Hamilton - 36
Ericsson - 35
Ricciardo - 33
Grosjean - 28
Massa - 27
Sainz - 27
Raikkonen - 22
Magnussen - 17

10:31 And here's the latest times:

1 Lewis Hamilton Mercedes 1m25.471s
2 Daniel Ricciardo Red Bull 1m25.879s +0.408
3 Kimi Raikkonen Ferrari 1m26.532s +1.061
4 Felipe Massa Williams 1m26.546s +1.075
5 Nico Hulkenberg Force India 1m27.404s +1.933
6 Marcus Ericsson Sauber 1m27.710s +2.239
7 Carlos Sainz Jr Toro Rosso 1m27.800s +2.329
8 Romain Grosjean Lotus 1m27.950s +2.479
9 Kevin Magnussen McLaren 1m29.028s +3.557

10:32 Having a run on the soft tyre, Hulkenberg drops in a 1m26.137s to go third.

10:33 BEN ANDERSON reports: "Ericsson's odd line through the opening sequence of corners seems to have cost him. He's out onto the runoff early in Turn 3."

10:35 Good news for the fans here, we've almost cracked 10C. It's currently 9.8C. This group have just seen Magnussen improve to a 1m28.689s.

10:36 And Massa, on mediums, to a 1m26.160s.

10:38 Raikkonen has spent the last 90 minutes or so in the garage, but he's now back out in the Spanish sunshine on a set of mediums.

10:39 Pardon a subtle plug for this week's edition of AUTOSPORT. Daniel Ricciardo, 2009 British F3 champion, is currently second.

@karunchandhok "Fantastic article on the rise and fall of British Formula 3 by series legend @MarcusSimmons54 ! Check it out in this week's Autosport"

10:41 Down at Turn 1, BEN ANDERSON reports: "Raikkonen looks committed in the Ferrari. It's giving him some work to do but he's sticking with it."

10:46 Raikkonen ends his run, the track momentarily falls silent.

10:48 Sainz breaks the silence by heading back out in the Toro Rosso.

10:48 While KARUN CHANDHOK isn't trackside this weekend, we've still got some responses from yesterday's #askKarunF1 chat to share with you.

Thanks for all of your questions, you can read his testing thoughts here: Chandhok answers your testing questions.

@zecarloscosta asks: "If you were running an F1 team, from the 2015 drivers, who would you pick for your team?"

KARUN CHANDHOK: "Fernando Alonso, obviously. I think he's the most complete driver in terms of delivering results on a Sunday when it counts. He may not be the best qualifier on the grid but he delivers in the races.

"I'd probably have Ricciardo alongside him. He's non-political, fast, he's got that great smiling attitude, good work ethic.

"He doesn't get ruffled, and it's also someone for the future. As a team principal it's nice to have one experienced guy and one slightly youthful one just to keep an eye on the long-term."

10:48 Formula 1 cars sprout all kinds of weird and wonderful 'growths' during testing as teams try new parts, and fit different pieces of kit to measure various things on track.

This latest example is from Toro Rosso this morning:

Toro Rosso 2015 nose detail

10:51 We've still got lush blue skies and glorious sunshine at the Circuit de Catalunya and that's having a positive impact on the temperatures. Air is up to 10.5C with the track a toasty 26.1C.

10:56 Lots of sporadic activity here, with cars completing shortish runs as they work through testing programmes

Here's the state of play as the clock approaches midday local time...

1 Lewis Hamilton Mercedes 1m25.471s
2 Daniel Ricciardo Red Bull 1m25.879s +0.408
3 Nico Hulkenberg Force India 1m26.137s +0.666
4 Felipe Massa Williams 1m26.160s +0.689
5 Kimi Raikkonen Ferrari 1m26.532s +1.061
6 Marcus Ericsson Sauber 1m27.710s +2.239
7 Carlos Sainz Jr Toro Rosso 1m27.800s +2.329
8 Romain Grosjean Lotus 1m27.950s +2.479
9 Kevin Magnussen McLaren 1m28.689s +3.218

Total laps:
Hamilton - 36
Ricciardo - 37
Hulkenberg - 53
Massa - 32
Raikkonen - 30
Ericsson - 35
Sainz - 32
Grosjen - 28
Magnussen - 25

10:57 @pirellisport "Track temperature is up to 26 degrees already; we might have a good chance of breaking yesterday's record of 29! #F1BarcelonaTest"

11:00 Massa goes fastest, on mediums, with a 1m24.950s. A few seconds later, Hulkenberg improves his best time on softs to 1m25.908s.

11:08 You can currently call the circuit Carless Sainz. No-one's out there.

11:10 That's changed, now, with Ricciardo and Magnussen heading out with 50 minutes until lunch.

11:12 Ricciardo improves with a 1m25.742. Massa is also now on track.

11:12 Word from colleagues a little closer to the window is that Massa is on softs.

11:14 And he duly sets three purple sectors and a new benchmark - 1m23.963s.

11:14 We saw a mini 'happy hour' yesterday of fast times on the soft and even super-softs before lunch. Go time if that's going to happen again.

11:16 It's time for us to start taking your contributions to our next lunchtime debate - what are the greatest 'upsets' in F1 history?

Let us know your suggestions - they don't only have to be race victories - using #autosportF1 on Twitter and we'll run through as many of them as we can while the track is quiet at lunchtime.

Thanks also to @mattsoutherden who suggested on Twitter: "@autosport For your readers' interaction on the live coverage today, how about 'What year had the best looking group of cars?' I think '88"

Sorry we haven't gone with your choice, Matt, but hopefully this will help you forgive us:

1988 Hungarian GP

11:16 Hamilton won't be part of any pre-lunch excitement...

@MercedesAMGF1 "That'll be us for the morning session - experimental setup changes underway so the #F1 W06 Hybrid remains parked @Circuitcat_eng for now."

11:18 Two soft laps just set. Raikkonen goes second with a 1m24.136s, Ericsson a 1m25.839s.

11:20 Ferrari has largely run its own programme so far this week, with lots of fuel on hard and medium tyres. Kimi's lap is the first real 'go' they've had on the soft tyres.

11:21 Here's a quick look at the times as they stand:

1 Felipe Massa Williams 1m23.963s
2 Kimi Raikkonen Ferrari 1m24.136s +0.173
3 Lewis Hamilton Mercedes 1m25.471s +1.508
4 Daniel Ricciardo Red Bull 1m25.742s +1.779
5 Marcus Ericsson Sauber 1m25.839s +1.876
6 Nico Hulkenberg Force India 1m25.908s +1.945
7 Carlos Sainz Jr Toro Rosso 1m27.800s +3.837
8 Romain Grosjean Lotus 1m27.950s +3.987
9 Kevin Magnussen McLaren 1m28.689s +4.726

11:23 Super-softs that time around for Massa and a new fastest time: 1m23.262s.

Nice, but still half-a-second off Rosberg's soft lap yesterday.

11:25 A little further down the order, Hulkenberg has also made a gain, clocking a 1m26.639s.

11:28 Kimi also throws on a set of super softs and sets a 1m23.276s - just 0.014 seconds shy of Massa's time.

11:29 Improvements also for Ericsson (to 1m25.559s) and Sainz (1m26.330s) in the last couple of minutes.

11:33 Kimi's on another super-soft run.

11:35 He sets a new purple sector at the end of the lap, but is half-a-second down on his earlier time, overall.

11:36 Magnussen goes P3 on the softs - 1m25.225s.

11:37 So that's a slight improvement on Button's 1m25.590s set on the yellow sidewalled Pirellis yesterday.

11:41 Here's the updated times, amid this flurry of super-soft and soft runs.

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Kevin Magnussen McLaren 1m25.225s +1.963
4 Lewis Hamilton Mercedes 1m25.471s +2.209
5 Marcus Ericsson Sauber 1m25.559s +2.297
6 Nico Hulkenberg Force India 1m25.639s +2.377
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068
9 Romain Grosjean Lotus 1m27.950s +4.688

11:43 And the daily lap tallies:

Hulkenberg - 67
Ricciardo - 47
Sainz - 47
Ericsson - 46
Raikkonen - 45
Massa - 43
Hamilton - 36
Grosjean - 35
Magnussen - 34

11:44 Hulkenberg goes P3 on super-softs: 1m24.939s.

11:47 In the case of Force India, super-softs isn't so much a glory run or even a qualifying simulation. Given the late start to the testing campaign they'd still be legitimately working through each tyre compound. With 70 laps on the board, it's been a productive morning.

11:50 P3 for Ericsson now on the super-soft, a 1m24.477s.

11:51 10 minutes until the break. Only Raikkonen, Ericsson, Ricciardo and Grosjean on track.

11:51 Ricciardo isn't getting involved in the rush of soft times, he's out there on the medium compound.

11:58 Into the last couple of minutes, no frenetic final flurry of times to speak of.

11:58 We do have Raikkonen back out on track, along with Hulkenberg, Ricciardo and Sainz.

11:59 Kimi returns to the pitlane to complete his morning's work.

12:00 The morning session is now complete.

12:01 Several cars, including Massa, are on track but they won't be in a position to start another lap.

12:03 As the last cars trickle back into pitlane, here's how the times finished up:

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Marcus Ericsson Sauber 1m24.477s +1.215
4 Nico Hulkenberg Force India 1m24.939s +1.677
5 Kevin Magnussen McLaren 1m25.225s +1.963
6 Lewis Hamilton Mercedes 1m25.471s +2.209
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068
9 Romain Grosjean Lotus 1m27.950s +4.688

12:04 The lunchtime lap counts:

Hulkenberg - 76
Ricciardo - 60
Sainz - 53
Raikkonen - 51
Ericsson - 50
Massa - 45
Grosjean - 44
Magnussen - 38
Hamilton - 36

12:06 And the headlines, we'll have the full report online shortly:

* Massa edges out Raikkonen in super-soft shootout
* Hulkenberg the busiest driver with 76 laps
* Mercedes end running early to prepare 'experimental' set-up
* Magnussen gets first running of 2015
* Session runs without interruption

12:17 BEN ANDERSON: "Not so much to report from trackside as yesterday, as (disappointingly) many of cars stayed in the pits for long stretches this morning, or only did very short runs.

"Was looking forward to seeing Hamilton drive the Mercedes, but he headed back to the pits after a big lock-up at Turn 1 and didn't re-appear. Team says it is working on a "big experimental set-up change" so no more Merc until this afternoon.

"Raikkonen looked very committed in the Ferrari, which didn't look as heavy with fuel as yesterday. He was trying hard to stay on throttle through Turn 3, but the car didn't look as precise turning in as he wanted, and it gave him a lot of work to do on exit at times.

"The Red Bull and Toro Rosso seem to have swapped engine maps today. The RB10's power delivery is much harsher than it was yesterday, while the STR10's seems more controlled.

"Sainz seemed to be driving more aggressively than Verstappen was yesterday, and he had a number of big moments at the exit of Turn 3.

"The Lotus still looks a handful, as does the Sauber, on the medium tyre, while the Force India looked slow to start with, but picked up speed as Hulkenberg put more laps on the new VJM08.

"The McLaren-Honda engine sounded much better than it did yesterday, as Kevin Magnussen got to grips with the MP4-30 for the first time."

12:20 For those wanting to catch up on what's happened so far today, here's our full report of the morning's action:

Massa fastest on day three morning

12:30 Thanks for your responses on the biggest F1 upsets of all-time. There was no disputing the most popular choice among you today: the performance of Damon Hill in the 1997 Hungarian GP.

Sure, he didn't win in the end, but an Arrows on the podium is good enough for us.

@MikeAJGriffin: "@autosport #autosportF1 Hill, Hungary 1997. Yes, Bridgestone helped a bit, but Arrows almost winning by 40 seconds? Outrageous."

@MMGMotorsport: "Damon Hill in the arrows at the hungaroring, or the performance of the brawn gp team! #autosportF1"

@pmiller1283: "Hill in his arrows in Hungary has to be up there. He was always great round there though #autosportf1"

@ARulamo: "#autosportF1 Biggest upset would be Damon Hill's near-victory with Arrows at the 1997 Hungarian gp - that just didn't make any sense!"

@pytho_iv: "Damon Hill almost wins the Hungarian GP in 1997. #autosportf1"

This is the second time Hill has appeared in AUTOSPORT Live for this race - back at Jerez our very own BEN ANDERSON nominated Hungary '97 as #1 in his list of Hill's top five GPs.

Damon Hill, 1997 Hungarian GP

12:33 An update from Ferrari on how its day is progressing:

"The team's programme focused mainly on further aero and set-up testing, while the plan for this afternoon is to run the car in race configuration.

"An electrical problem, combined with some pre-planned work, required a long stop in the garage.

"However, Kimi was out on track again towards the end of the morning, with the planned programme due to resume after the lunch break."

12:39 This suggestion for greatest F1 upset is a popular one with several people at AUTOSPORT, and it's another heartbreaking near-miss: Ivan Capelli nearly winning the 1990 French Grand Prix for the plucky Leyton House outfit.

@marcleigh: "@autosport France 1990 Leyton House nearly winning and they did not even get on the grid for the race before"

@Halsey2722: "#autosportF1 I'd have to say Leyton House in the 1990 French Grand Prix. From non-qualifiers to being in contention to win was highly surprising."

Ivan Capelli, Alain Prost, 1990 French GP

12:42 For those just joining us who want to know what's gone on this morning in F1 testing, here's our lunchtime report:

Massa fastest on day three morning

12:49 Let's have a more recent F1 upset next, shall we? This one wasn't a near-miss: Pastor Maldonado ending Williams's agonisingly long wait for another GP victory - at this track in 2012.

@James16Matthews: "@autosport Maldonado in 2012. No one expected that Spanish first position. #autosportf1"

@TweetingDAB: "+1 for Maldonado @ Spain 2012 #autosportF1"

@richierandle: "#autosportf1 one of: Panis winning Monaco 96, Hill Hungary 97, Johansson on the podium in the Onyx in 89, Maldonado Spain 2012."

Here's Maldonado being hunted by Fernando Alonso's Ferrari that afternoon.

Pastor Maldonado, Fernando Alonso, 2012 Spanish GP

12:56 After starting things off earlier with two minnows missing out on F1 victories, we've got to end this F1 upsets discussion on a high note.

So as our team at the track prepares to take over again with live updates from Barcelona, we'll sign off with the feel-good story of Brawn GP's dominant debut in the 2009 Australian Grand Prix.

@jamesoneill: "@autosport #autosportf1 Brawn 2009. Getting to melbourne was a fairy tale: 1-2 finish there and season that followed..."

@DirectorofEarth: "#autosportF1 Not sure if it's the kind you mean, but how about Brawn going from near-bankruptcy to the 2009 title? I call that an upset! #F1"

Rubens Barrichello, Ross Brawn, Jenson Button, Australian GP 2009

12:59 Some great memories there, and some questionable looking cars in hindsight - those 2012 noses were hardly lookers, were they?

We're about to go green here in Barcelona for the afternoon running. Air temperature is up to 13.7C, track temp is 27.2C and the sun is continuing to shine.

13:00 A lot to look forward to this afternoon and we're here to bring it to you as the session commences.

13:01 This morning's pacesetter Massa is the first man out, wasting no time. Williams was among the teams to run qualifying simulations on the super-soft before lunch.

Recent days have featured longer runs in the afternoon, but we'll likely see some more soft running closer to the end of play.

13:02 To recap the times as they stand:

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Marcus Ericsson Sauber 1m24.477s +1.215
4 Nico Hulkenberg Force India 1m24.939s +1.677
5 Kevin Magnussen McLaren 1m25.225s +1.963
6 Lewis Hamilton Mercedes 1m25.471s +2.209
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068
9 Romain Grosjean Lotus 1m27.950s +4.688

13:02 And the lap count:

Hulkenberg - 76
Ricciardo - 60
Sainz - 53
Raikkonen - 51
Ericsson - 50
Massa - 45
Grosjean - 44
Magnussen - 38
Hamilton - 36

13:05 Massa, having toured through pitlane initially, starts a flying lap.

Here's a recap of the morning running, which he narrowly topped over Kimi Raikkonen.

Barcelona F1 test: Felipe Massa fastest on day three morning

13:07 Kimi has also left pitlane, joining his former Ferrari team-mate on track.

13:12 They're still the only men on track. Massa is on the hard compound, Kimi mediums, ingredients for race sims.

13:15 @McLarenF1 ".@KevinMagnussen is suited and booted, ready to leave the garage for this afternoon's session. #F1Testing"

13:20 We now have a third car on the circuit; Magnussen, deputising for the man who's replaced him as a race driver, Alonso.

13:24 Of course, Magnussen - who has returned to the pits - remains on the books at McLaren as its official test and reserve driver and in last night's media session, Jenson Button said he was looking forward to the Dane's feedback on the new package.

"Kevin has always been very good at jumping in the car and getting to grips with it very quickly.

"It is something we found when he jumped into an F1 car, so I don't think that will be an issue.

"To be fair, it is always nice having as many views as you can possibly have. It is a shame that Fernando cannot do mileage – always good to have information from different parties. So it is good that Kevin is in the car, interesting to see his comments and see what he has to say.

"He is driving the car in a pretty good state, I jumped in at first test and we have come a long way since then."

13:26 Ricciardo has now headed out in the Red Bull.

Massa and Raikkonen are still running. Felipe is 15 laps into a stint, Raikkonen 10. Kimi has been ultra-consistent on the medium tyre, each lap has been a 1m30s.

13:35 Massa has now pitted to complete his 18-lap run on the hard rubber. Raikkonen is up to his 17th on the medium and Ricciardo has now done seven laps on the medium.

13:36 Also on track, Grosjean has improved to a 1m27.574s in the Lotus, while Ericsson has appeared in the Sauber.

13:40 Interestingly, the Red Bull doesn't sound as 'on it' coming past our position in the media centre on the pit straight as the Mercedes or Ferrari units do. Nothing wrong with Ricciardo's times, though, as he continues the long run.

13:41 Kimi comes in for a pitstop after 20 laps on that set of mediums and heads back out.

13:47 Hulkenberg and Sainz have also been out briefly this afternoon. Hamilton is the only driver we're yet to see as Mercedes prepares its 'experimental' set-up.

13:51 Ricciardo has now returned to the garage after a very consistent 15-lap run on the medium.

14:00 Massa and Raikkonen continue on their race runs, with Ericsson, Hulkenberg and Sainz also out on track.

14:03 MITCHELL ADAM reports from the pit building roof that Sainz is on a race run, sparking all the way down the straight heavy with fuel. His pit board reads L56. Meanwhile, Raikkonen's board says L34, counting upwards.

14:08 Massa pits after a 14-lap stint and is soon followed by Raikkonen, who also did 14 laps on that stint. The Finn's last lap saw his pace drop off by two seconds.

14:11 Raikkonen rejoins the fray with a set of the development tyres bolted onto his car and he has Hulkenberg, Ricciardo, Grosjean and Sainz for company.

14:16 After starting in the high 1m27s, Raikkonen has moved into the low 1m28s on this run and is now just four laps away from his century.

14:18 What do drivers do when they're not in the car? Lots of things. Daniil Kvyat is currently in 'meet and greet' mode behind the Red Bull garage. Fortunately there's not a selfie stick in sight.

14:21 Other than Grosjean skipping ahead of Sainz a little earlier, no real change to the times at this stage.

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Marcus Ericsson Sauber 1m24.477s +1.215
4 Nico Hulkenberg Force India 1m24.939s +1.677
5 Kevin Magnussen McLaren 1m25.225s +1.963
6 Lewis Hamilton Mercedes 1m25.471s +2.209
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Romain Grosjean Lotus 1m26.112s +2.850
9 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068

14:22 A lot of movement on the lap counts, though.

Raikkonen - 99
Hulkenberg - 99
Ricciardo - 88
Sainz - 78
Massa - 76
Ericsson - 68
Grosjean - 59
Magnussen - 39
Hamilton - 36

14:26 Raikkonen is the first driver to crack a century of laps today. He's pushing on, will be about halfway through the final stint of his race simulation on the unmarked Pirellis, which actually look pretty cool on the Ferrari.

14:31 Massa is back out on the mediums.

14:32 Ricciardo pits after a 17-lap run on the mediums.

14:35 Hulkenberg is back out and has joined Raikkonen in the '100 club'. They've put nearly 180 laps on that new Force India since it appeared just before lunch yesterday.

It might not make up for an overall lack of mileage when they head to Australia, but it's a very positive start.

14:40 Over the last hour or so, the level of cloud cover has increased significantly. You'd probably call it cloudy now. As a result, the track temperature has dropped to 17.2C.

14:43 Here's a snapshot of the day's headlines:

* Raikkonen carries out race simulation in afternoon
* Massa, Ricciardo and Sainz also focus on longer stints
* Massa edges out Raikkonen in morning super-soft shootout
* Raikkonen heads lap tally with 113 laps
* Mercedes yet to run in afternoon as they prepare 'experimental' set-up
* Magnussen gets first running of 2015, but has done only one lap since lunch

14:44 Here comes Lewis - he's just left pitlane.

14:47 Hamilton, on the medium tyres, crosses the line to start his first timed lap of the afternoon.

14:47 And it's a 1m30.327s for Hamilton...

14:49 Next time around, Hamilton clocks a 1m26.686s.

14:49 And that's the end of Kimi's race simulation. Time for an icecream.

14:50 Having started in the high 1m27s, Raikkonen ends that third stint of his race simulation with a 1m33.986s.

14:52 @pirellisport: "Most teams concentrating on race simulations, so we're unlikely to see anything really quick until the end of the session"

14:55 We've still got a few responses from KARUN CHANDHOK, who was trackside for us during the first two days of the test, which we gathered from Friday's #askKarunF1 chat to share with you.

Thanks for all of your questions, you can read his testing thoughts here: Chandhok answers your testing questions.

@Forix_Jan asks: "You have been involved in smaller teams, is a more customer-car friendly F1 the way to go to get a full 26 cars grid back?"

KARUN CHANDHOK: "It’s a funny situation because on one side the traditionalist, the historian in me, wants to say that's not the DNA of F1. But on the flipside I look up and down the paddock, and having just nine or 10 teams on the grid isn't as good as having 13 cars on the grid.

"Fundamentally a Force India or a Toro Rosso is a customer car. They have to make their own monococque and aero but a large part – the powertrain – is coming off the shelf. So if you can make that more affordable to teams, then all of a sudden they can all afford to go racing again.

"In the mid-2000s when Max Mosley introduced a cap on the cost of the engines, I think that was a huge step for the small teams. Now the problem is the powertrains are so expensive, and that is the difficulty at the moment. Unless they can fix that it will remain very difficult for the small teams."

14:58 A relatively quiet moment in the afternoon running. Hamilton has completed his little run and we only have Hulkenberg, Grosjean and Sainz on track.

15:03 Hamilton is now back out on track, and sets a new personal best third sector, while Magnussen has also been out and is back in again.

15:05 With two hours left on the clock, here's the latest on the times. Nothing's changed in the last hour, really.

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Marcus Ericsson Sauber 1m24.477s +1.215
4 Nico Hulkenberg Force India 1m24.939s +1.677
5 Kevin Magnussen McLaren 1m25.225s +1.963
6 Lewis Hamilton Mercedes 1m25.471s +2.209
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Romain Grosjean Lotus 1m26.112s +2.850
9 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068

15:06 There's been more movement on the lap front, though:

Hulkenberg - 121
Raikkonen - 118
Sainz - 100
Ricciardo - 94
Massa - 88
Grosjean - 81
Ericsson - 74
Hamilton - 46
Magnussen - 39

15:10 We currently have Massa, Ericsson (on a race sim), Hamilton, Grosjean and Sainz on track.

15:16 As it's the weekend, we've been joined by quite a few more spectators here at Circuit de Catalunya. There's a noticeable increase in the number of people in the paddock area and grandstands over Thursday and Friday

Many of them will have been hoping to watch a certain F. Alonso in action. But while he recovers, they're still out in force.

15:19 If it's any consolation to them, another Spaniard is now a member of the 100-lap club. Carlos Sainz is on his 109th lap as he works through a race simulation in the Toro Rosso.

15:22 Ericsson is in the early laps of his second race simulation of the week. After Thursday's running, which the Swede described as "probably the best day of my pre-season so far", he spoke about his long run.

"I was very happy with my race simulation, because the car was behaving consistently and I knew what to expect. But also I was happy that I was able to be really consistent with the laps and that the drop-off wasn’t too bad either. So it was a good race sim."

15:26 Don't expect to see Magnussen add to his daily lap tally.

@Circuitcat_eng "McLaren announces that they're not going back on track anymore for today. They've had an oil leak. #F1 #TestBarcelona #Circuit"

15:29 Hamilton's getting back in the zone. He's gone third-fastest with a 1m24.181s on the medium.

15:30 Rather ominously, that time is less than a second shy of what Massa and Raikkonen did on the super-soft before lunch.

15:32 Hamilton has completed his run and is back in the pits, leaving the track to Ericsson, Hulkenberg, recent returnee Ricciardo, Grosjean and Sainz.

15:33 Massa heads out to join them, with 90 minutes left on the clock.

15:35 As does Raikkonen.

15:36 Kimi's on the hard Pirelli with some flo-viz paint accessorising the Ferrari's rear wing. Medium for Massa and Ricciardo.

15:40 Raikkonen ends his run, while Ricciardo and Grosjean are the latest to set more than 100 laps. Here's the full tally:

Hulkenberg - 134
Raikkonen - 121
Sainz - 121
Ricciardo - 103
Grosjean - 103
Massa - 95
Ericsson - 93
Hamilton - 56
Magnussen - 39

15:42 Massa and Ricciardo are both on longish runs on the medium compound. Massa is lapping consistently in the 28s, Ricciardo in the 29s and 30s but has spent longer on his set.

15:48 Something we haven't really talked about yet is the speed trap data, which is supplied by the circuit. Here's yesterday's start-finish line speeds:

Bottas - 288.0km/h
Nasr - 287.2km/h
Maldonado - 285.7km/h
Rosberg - 282.7km/h
Verstappen - 281.9km/h
Kvyat - 279.7km/h
Hulkenberg - 279.0km/h
Vettel - 278.3km/h
Button - 274.8km/h

15:49 The 2015 AUTOSPORT Grand Prix Predictor is now open - play for free to win great prizes. Have you set your team up yet?

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15:49 @KevinMagnussen "Great to be back in the car today. The #McLarenHonda feels great! Plenty more to come from this one. Thanks for all the support today guys!"

15:52 Hamilton has bolted on a set of softs, improves to a 1m23.648s.

15:54 Massa and Ricciardo have pitted to end their runs.

15:55 And Massa has ended his day.

@WilliamsRacing "And that's day two finished or us and @MassaFelipe19's winter test programme completed. Next stop Melbourne"

15:58 With one hour and one day remaining of pre-season testing, here are the updated times, with Hamilton the big (only) mover:

1 Felipe Massa Williams 1m23.262s
2 Kimi Raikkonen Ferrari 1m23.276s +0.014
3 Lewis Hamilton Mercedes 1m23.648s +0.386
4 Marcus Ericsson Sauber 1m24.477s +1.215
5 Nico Hulkenberg Force India 1m24.939s +1.677
6 Kevin Magnussen McLaren 1m25.225s +1.963
7 Daniel Ricciardo Red Bull 1m25.742s +2.480
8 Romain Grosjean Lotus 1m26.112s +2.850
9 Carlos Sainz Jr Toro Rosso 1m26.330s +3.068

16:00 So Hamilton's first run on the soft tyres wasn't quite as dramatic as Rosberg's yesterday. But the numbers will make for pleasant reading in Brackley.

He's just started a second run.

16:01 Green in Sector 1, purple in Sector 2.

16:02 And purple overall. 1m23.022s, a soft tyre time 0.240 seconds faster than Massa and Raikkonen on the super-soft.

16:11 After that statement by Mercedes everything else seems a little uneventful. But for what it's worth, Ericsson and Grosjean are continuing their race runs and Ricciardo is also out on another long stint.

16:13 Grosjean has improved, finding a second in the Lotus to log a 1m25.183s.

16:21 With 40 minutes to go until the end of the session, here's the latest lap count:

Hulkenberg - 146
Raikkonen - 131
Sainz - 123
Ricciardo - 120
Ericsson - 119
Grosjean - 110
Massa - 102
Hamilton - 67
Magnussen - 39

16:22 Grosjean and Ricciardo are still plugging away with their race runs while everyone else is in the garage.

16:25 We've got our first red flag of the day...

16:27 It's the Sauber of Marcus Ericsson. He's stopped at Turn 3.

16:31 The Sauber is being hoisted onto the back of the flatbed truck by the marshals with a few of the team's mechanics on hand to oversee proceedings.

16:36 The Sauber is back in the pits and the session goes green again.

16:37 Hamilton is straight out and he's got the super-softs on!

16:38 Grosjean, Hulkenberg and Sainz also head out.

16:40 Sorry, there was some miscommunication with those close to the window and Hamilton is actually on the hards.

16:45 Grosjean improves to a 1m24.200s to go fourth quickest.

16:46 Hamilton continues to pound round on the hard tyres, with Grosjean, Ericsson, Sainz, Hulkenberg and Ricciardo for company.

16:47 Hamilton pits, bringing his tally to 76 for the day.

16:47 Sainz improves to the fourth fastest time with a 1m24.191s in the Toro Rosso.

16:48 We have a second red flag.

16:48 It's Carlos Sainz. The Spaniard has stopped at Turn 3 after setting his fastest lap of the day.

16:53 Sainz's Toro Rosso has been covered in a sheet and is being hoisted onto the back of the flatbed truck...

16:55 The Toro Rosso is being secured in place on the back of the truck. With five minutes of the session remaining, it doesn't look like we will get any more running...

16:57 We're still under red flag conditions, folks, but we can report that the truck is on the move back towards the pits.

16:59 An engine has been fired up in one of the garages, which is ambitious as only 90 seconds remain...

17:00 The timing screens are showing a green flag...

17:01 Ericsson and Hulkenberg have headed out.

17:02 But now the chequered flag is out! Day three of the final pre-season test is done and dusted!

17:02 Here's how they finished...

1 Lewis Hamilton Mercedes 1m23.022s
2 Felipe Massa Williams 1m23.262s +0.240
3 Kimi Raikkonen Ferrari 1m23.276s +0.254
4 Carlos Sainz Jr Toro Rosso 1m24.191s +1.169
5 Romain Grosjean Lotus 1m24.200s +1.178
6 Marcus Ericsson Sauber 1m24.477s +1.455
7 Nico Hulkenberg Force India 1m24.939s +1.917
8 Kevin Magnussen McLaren 1m25.225s +2.203
9 Daniel Ricciardo Red Bull 1m25.742s +2.720

17:03 And here's the final lap count:

Hulkenberg 158
Raikkonen 136
Sainz 132
Ricciardo 128
Ericsson 123
Grosjean 116
Massa 102
Hamilton 76
Magnussen 39

17:26 Thanks for joining us today, here's the end of day report. Have a good evening, we'll see you tomorrow morning from 8am.

Barcelona F1 test: Mercedes tops penultimate day with Hamilton

P Driver Team Time
1  Lewis HamiltonMercedes 1m23.022s
2  Felipe MassaWilliams 1m23.262s  +0.240
3  Kimi RaikkonenFerrari 1m23.276s  +0.254
4  Carlos Sainz JrToro Rosso 1m24.191s  +1.169
5  Romain GrosjeanLotus 1m24.200s  +1.178
6  Marcus EricssonSauber 1m24.477s  +1.455
7  Nico HulkenbergForce India 1m24.939s  +1.917
8  Kevin MagnussenMcLaren 1m25.225s  +2.203
9  Daniel RicciardoRed Bull 1m25.742s  +2.720
All timing unofficial. Updated: 16:49 GMT
Mainly cloudy High Temp: 11°C / 52°F
Track: Dry
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