Day four of F1 testing as it happened

Kimi Raikkonen finishes fastest on the fourth and final day of the first pre-season test as Lewis Hamilton completes 145 laps.

8 February 2013 Last updated at 17:06 GMT

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As it happened

  1. 0745: 

    Problems? What problems? If Mercedes wanted to show that their earlier issues are behind them then Nico Rosberg driving 407 miles - the equivalent of travelling from London to Glasgow - should just about do it...

  2. 0747: 

    Welcome to the fourth and final day of testing in Jerez, Spain. We have had three different drivers from three different teams topping the timesheets this week. McLaren's Jenson Button took the honours on day one, Romain Grosjean in the Lotus on day two and the Ferrari of Felipe Massa on day three. Is it now the turn of Mercedes and Lewis Hamilton?

  3.   
    Andrew Benson, Chief F1 writer

    "All eyes will be on Lewis Hamilton this morning. Team-mate Nico Rosberg finally got some good running on Thursday, completing 148 laps in a car that had not managed 30 over the previous two days, and Hamilton will be hoping it is as reliable for him. Hamilton will be trying out Mercedes' new front wing, which Rosberg described as a 'good direction', albeit while also admitting he was 'struggling with understeer' (a lack of front-end grip). But Hamilton will be Mercedes' reality check. After two flying laps on Wednesday, he said the car had less downforce than last year's McLaren - not a massively encouraging sign - and a full day's work on Friday will enable him to give the team a sense of how they compare with last season's pace-setting team. It will be fingers crossed for all in the Mercedes garage. The last thing they and Hamilton need are more reliability problems."

  4.  

    Mercedes' Nico Rosberg on Twitter: "Great day of testing [on Thursday]! No probs at all with car & got through our entire program ,even time for pit stop practice. Massa time doesn't worry me!"

  5.  
    GET INVOLVED

    Just a few minutes until we start seeing some movement on the circuit, so once again I'm looking for you to keep me company for the next eight hours. To kick things off, I'd love to know how exciting you feel this season will be? Can it top the unpredictability we had last year? What, for you, was the most memorable season-ever in Formula 1?

    Get involved in the usual ways, on Twitter: #bbcf1 and via text: 81111 (UK only). Don't forget to pop your name on those texts too.

  6.  
    GET INVOLVED

    Luke John Cassar on Twitter: "Morning all to those of you who are formula 1 fanatics. Good morning from the island of Malta. Excited to read Gary Anderson's views."

  7. 0803: 

    Felipe Massa clocked the fastest time we have had all week with one minute 17.879 seconds on Thursday. He achieved that on the yellow soft tyre, while Nico Rosberg and Sebastian Vettel - second and third fastest respectively - were on the medium compound.

  8. 0805: 
    GO! GO! GO!

    The circuit is open and we are under way as Kimi Raikkonen, Jean-Eric Vergne, Esteban Gutierrez,Charles Pic and Jules Bianchi, in the Force India, waste no time in heading out.

  9. 0808: 

    Lewis Hamilton is out for his first foray around the circuit since Tuesday. The Briton managed just 15 laps then before a braking problem cut short his testing time and both he and Mercedes will be hoping for considerably better fortunes today.

  10. 0813: 

    This is our driver line-up for today

    Lotus - Kimi Raikkonen

    Mercedes - Lewis Hamilton

    Red Bull - Sebastian Vettel

    Ferrari - Pedro de la Rosa

    McLaren - Sergio Perez

    Toro Rosso - Jean-Eric Vergne

    Caterham - Charles Pic

    Force India - Jules Bianchi

    Sauber - Esteban Gutierrez

    Williams - Valtteri Bottas

    Marussia - Luiz Razia

  11.  
    GET INVOLVED

    Luke John Cassar on Twitter: "Memorable season was 2012 the way it finished at Interlagos was an absolute surprising seeing Sebastian Vettel spinning and wins the title."

    Karla on Twitter: "Memorable season: '07 Explosive impact of Lewis Hamilton, ructions at McLaren with Fernando Alonso & Spygate. Season down to the wire. Then again in 08!"

    Aaron Gallimore on Twitter: "Got to be 2009 for the most memorable year. After Jenson Button's run of victories from the beginning I thought I was in dream land!"

  12. 0817: 

    No messing about from Lewis Hamilton. Three laps in and he has put a time on the board - the first of the day - as he goes round in 1m35.876s before heading back into the pit lane. Just the Lotus of Kimi Raikkonen out there at the moment.

  13.  

    Lotus on Twitter: "A couple of runs round the block, now time to check the points and decoke the pistons, or some such tech stuff."

  14. 0819: 

    A reminder that there is no Felipe Massa out there today. After three days on the circuit he is taking a well-earned breather, with Pedro de la Rosa the man in the Ferrari. Massa's time will take some beating today, but even so, the Brazilian still feels Jenson Button's first-day effort of 1m18.861s was very impressive.

  15.   
    Andrew Benson, Chief F1 writer

    "Ferrari's Felipe Massa was the star of the third day of the test, setting the fastest time by 0.887 seconds - and a second faster than Jenson Button's time on the first day, which the Brazilian had described as 'incredible'. Massa was cautious about the Ferrari's pace, saying: 'I think it was a good lap I did, but we can't say what we're going to have at the beginning of the championship'. He added that he still believed Button's lap was 'incredible', given it had been set on the first day, on a dirty track and on the hard tyres while Massa himself had done his on the softs."

  16. 0825: 

    Esteban Gutierrez records his first timed lap in the Sauber and it is a quick one, flying round the chilly Jerez circuit in 1m20.797s to top the two-man timesheet.

  17.  
    GET INVOLVED

    Paddy, via text: "Recent years have all had great moments. I couldn't PICK one. 2010 had the big showdown on the final race. Honestly who saw Sebastian Vettel taking that one. 2011......Canada. Need I say anymore!!! 2012. Six world champions and another battle all the way to Brazil. As long as Adrian Newey misses a trick or two, we could be in for real competitive season!"

  18. 0835: 

    Sebastian Vettel goes second with his first timed effort of 1m21.547s, but immediately improves on that by going round in 1m20.551s to edge ahead of Esteban Gutierrez.

  19. 0838: 

    Track temperature is warming up a bit since it was 2.8C when the first few cars started rumbling round the Jerez circuit half-an-hour ago and is now up to 7.8C. Still cool in the air at 4C - certainly a coat is a must for when our technical analyst Gary Anderson takes a wander trackside.

  20. 0844: 

    Speaking of Gary Anderson, he has given his extensive thoughts on the 2013 cars we have seen so far (just Williams left to launch) and his video can be seen at the top of this very page for desktop users, although you might need to hit refresh first. For those of you following on mobile and app, the video is on the main page of Formula 1. Certainly worth a watch!

  21.  
    GET INVOLVED

    Tom Stewart on Twitter: "For me the best season in F1 was 2000, V10's roaring around the place, and an emotional title for Michael Schumacher!"

    Khalis Mulla on Twitter: "The best season I have seen has to be 2000. The way a certain Michael Schumacher and Mika Hakinnen were head and shoulders above the rest was epic!"

    James Macdonald on Twitter: "Memorable seasons: the '06 Schumi/Alonso fight was wonderfully intense but, and I know this isn't a popular choice, as a Schumi fan, '04 was memorable: a brilliant display of utter supremacy."

    What was your most memorable F1 season? Let us know, #bbcf1 and on text: 81111 (UK only).

  22. 0851: 

    Lewis Hamilton now has five laps under his belt and he improves on his earlier time by clocking 1m25.073s. That puts the Mercedes driver fourth fastest. Jules Bianchi heads round for his first flyer in the Force India and his time of 1m32.493s is seventh fastest. Eight of the 11 drivers have clocked timed laps now.

  23. 0854: 
    Red Bull's Sebastian Vettel

    Sebastian Vettel arriving at the Red Bull motorhome a few hours ago. It has been pretty much smooth sailing for Red Bull so far, with Mark Webber racking up plenty of laps during the first two days and Vettel hitting triple figures round the circuit in his first test of 2013 on day three.

  24.   
    Andrew Benson, Chief F1 writer

    "World champion Sebastian Vettel and Lotus driver Kimi Raikkonen both had their first experience of their 2013 cars on Thursday but, as you would expect, there were no pearls of wisdom from either man. Raikkonen is renowned for his taciturn nature in interviews, and Vettel has perfected the art of saying nothing in an engaging way. Raikkonen, whose running was ended early by an electronics issue, said he thought the car was good 'but how good we will only see during the races'. Vettel, for his part, said it was 'was nice to be back in the car and not much more than that'. The Red Bull driver added: 'It was about cleaning (off) the rust. The car is working well. It's difficult to judge the speed, but the reliability was pretty good and I feel pretty happy with the car. I expect it to be at least as tight as last year. The regulations haven't really changed and if you are in the front it is hard to find something else that makes you quicker.'"

  25.  

    Mercedes on Twitter: "First run completed by Lewis. It's still very chilly out there at the moment."

  26. 0900: 
    LATEST LAP TIMES

    1 Sebastian Vettel (Red Bull) 1m20.155s

    2 Esteban Gutierrez (Sauber) 1m20.639s

    3 Jean-Eric Vergne (Toro Rosso) 1m24.005s

    4 Charles Pic (Caterham) 1m24.379s

    5 Lewis Hamilton (Mercedes) 1m25.073s

    6 Valtteri Bottas (Williams) 1m27.285s

    7 Jules Bianchi (Force India) 1m32.493s

    8 Luiz Razia (Marussia) 1m42.379s

  27.  
    GET INVOLVED

    Ben, via text: "Lots of recent seasons cropping up in the 'best ever' category. May I take you back to 1997. The Villeneuve & Schumacher ding dong all season leading to both drivers and Frentzen setting the exact same time in qualifying for the showdown race at the very circuit the cars are on today. We all know what happened and Schumacher was ultimately disqualified from the championship. Oh and Damon Hill came within a lap of winning in an Arrows that year!"

    Rob, via text: "1984. My first season watching F1. I still remember that titanic battle between Niki Lauda and Alain Prost. Showing my age there!"

  28. 0906: 

    Pedro de la Rosa has yet to emerge from the Ferrari garage with just over an hour of the session gone. In contrast, Esteban Gutierrez is getting plenty of laps in, 12 to be exact, and he goes top of the timesheet with his latest effort - 1m19.996s.

  29.  

    Ashley Northridge on Twitter: "Can you tell us if they have a full day of testing today or do they knock off early?"

    Full day as far as I am aware, not heard otherwise. Although Lewis Hamilton is apparently holding a media interview at 1230GMT, but that may be in his unofficial lunch break.

  30. 0911: 
    RED FLAG

    Pedro de la Rosa finally heads out, but it is a short lived venture as he causes the first red flag incident of the day. Lots of smoke coming from the back of his Ferrari...

  31. 0913: 

    Literally in the time it takes me to type that previous entry the recovery vehicles have been despatched and are already on the scene. Looks like it won't be long before the Ferrari is back in the garage and we are under way once again on the circuit. Have to admire that efficiency.

  32.  

    Force India on Twitter: "The programme for Jules Bianchi involves aero sweeps to begin with. Later he will focus on tyre data collection combined with set-up tweaks."

  33.  

    Ferrari on Twitter: "Difficult start of the day for De La Rosa: F138 stopped on track after the second installation lap."

  34. 0925: 

    This will be such a shame for Pedro de la Rosa if his testing in the Ferrari ends before it has really started. The Spaniard was signed up by Ferrari last month as their development driver, meaning he would predominantly spend time in the simulator and he had not been expecting to test at all in Jerez. He had described taking part today as a "unique opportunity".

  35.  
    GET INVOLVED

    Alex, via text: "For me the best season was 1976, yes you have to be in your 40's! But it had everything. The English playboy James Hunt and the man machine Niki Lauda, close races, life changing accident and a last race in the rain which had real drama. Who could forget Lauda in bandages with blood stains taking his crash helmet off just weeks after nearly dying! Sorry class of 2012 but no where near to Hunt and Lauda."

  36. 0929: 

    Pedro de la Rosa's stranded Ferrari has been whisked back to the team's garage on the low loader and we should be under way shortly, hopefully.

  37. 0931: 

    And off we go again, Kimi Raikkonen straight back out on the circuit in the Lotus. No timed lap yet from the Finn, whose testing was cut short in the afternoon of day three due to electrical issues.

  38. 0933: 

    Lewis Hamilton, Jean-Eric Vergne, Esteban Gutierrez, Charles Pic and Valtteri Bottas head out to join Kimi Raikkonen out on the circuit now. Keeping an eye on the situation at Ferrari and will update date as soon as we know anything.

  39. 0943: 

    Kimi Raikkonen is off the mark with 1m19.794s in the Lotus and Lewis Hamilton and Sergio Perez soon follow suit in posting sub 1m20s times, clocking 1m19.733s and 1m19.696s respectively. Perez's time sends him top of the timesheet.

  40. 0945: 
    RED FLAG

    Red flag again as Esteban Gutierrez's Sauber comes to a stop. Once again the low loader is swiftly on the scene and the process of recovery is under way.

  41. 0946: 

    Covers are on and off the Sauber goes and in no time at all the circuit is open again.

  42.  

    Sauber on Twitter: "The team did a check of the fuel system and, as a result, Esteban Gutierrez ran out of fuel."

  43. 0955: 

    Here is a run down of the amount of laps completed so far today:

    1 Esteban Gutierrez 26 laps

    2 Lewis Hamilton 17 laps

    3 Charles Pic 17 laps

    4 Sebastian Vettel 14 laps

    5 Jean-Eric Vergne 13 laps

    6 Sergio Perez 10 laps

    7 Kimi Raikkonen 10 laps

    8 Valtteri Bottas 9 laps

    9 Jules Bianchi 7 laps

    10 Luiz Razia 7 laps

    11 Pedro de la Rosa 2 laps

  44. 0956: 

    Those lap times are coming down now and Kimi Raikkonen goes fastest in the Lotus with 1m19.157s, just over half a second quicker than McLaren's Sergio Perez.

  45. 0958: 

    No official update from Ferrari after Pedro de La Rosa broke down earlier but we can get the thoughts of BBC F1 technical analyst Gary Anderson on the incident...

  46.   
    BBC F1 technical analyst Gary Anderson in Jerez

    "It's not a great start to the day for Ferrari. New development driver Pedro de la Rosa is in the car so he has a baseline on which to base his work in the simulator, which is where he will be spending most of his time with the team, but he stopped out on the track in a cloud of smoke on his second 'installation' lap. Ferrari say it was an oil leak which caused the car to catch fire. And they are not sure if they will be out again today because there is a limited amount of spares, as usual at the first test of a new season."

  47. 1002: 
    Ferrari's Pedro de la Rosa

    Pedro de la Rosa inspecting the plume of smoke coming from the rear of his Ferrari. The Spaniard was crawling around the circuit in the lead up to the stop.

  48. 1006: 

    All change at the top of the timesheet once again as Sebastian Vettel goes round in 1m18.789s - his fastest time in 2013 testing so far and it puts him 0.368s ahead of Kimi Raikkonen.

  49. 1011: 

    Valtteri Bottas improves to a 1m20.683s to climb up to seventh. In his first outing as an offical F1 race driver for Williams, Bottas managed 86 laps without issue, so it has been so far so good for the rookie.

  50. 1014: 

    "I'm quite easy-going. I just like to be a friendly face in the paddock but ultimately, focus and ambition are probably more important in terms of body language because I'm there to do a job."

    Want to know more about Force India's Paul di Resta and what he has been up to during the winter period? Check out our feature on the British driver on the website.

  51. 1016: 

    Esteban Gutierrez is the only man out on the circuit at the moment as we enter a morning lull in activity. Gutierrez has clocked up 26 laps so far and it is all looking peachy for Mercedes and Lewis Hamilton has 24 laps to his name so far.

  52. 1019: 

    Ferrari have tweeted an update with the latest on their F138 after it came to a stop during Pedro de la Rosa's first run out earlier: "Work in progress to check conditions of the F138, it will take a while to hit the track again."

  53. 1026: 

    Lewis Hamilton is back out on the medium tyre and his lap count is quickly increasing with the 2008 world champion up to 27 for the day, the latest of which sees him set a personal best with 1m19.575s. At the same stage on day three, Hamilton's team-mate Nico Rosberg had been round the Jerez circuit 34 times, so Mercedes are certainly looking to get as much as they can out of the car after day one and two issues.

  54.  
    GET INVOLVED

    Katy on Twitter: "Best season by far was Lewis Hamilton's rookie season, I'd watched F1 as a kid but this got me hooked!

    James Mack on Twitter: "1986. 1000bhp plus turbo's. Prost, Mansell, Piquet and Senna fighting down to the wire for the title."

    Matt Claypole on Twitter: "Most memorable season? 91' was a fantastic season with the titanic Senna-Mansell battles. Murray Walker was just the cherry on top."

    What was your most memorable F1 season? Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  55. 1034: 

    Valtteri Bottas is back out and enjoys a good run to record his personal best of the day with 1m20.647s. The Williams driver is the seventh fastest, but almost two seconds off Esteban Gutierrez.

  56.  

    BBC Sport chief F1 writer Andrew Benson on Twitter: "News in from Gary Anderson - it was a gearbox problem that stopped the Ferrari. They're changing it so Pedro de la Rosa should be out later."

  57. 1039: 

    Good news for Ferrari and Pedro de la Rosa that it looks like they will manage some more time out on the circuit before the day is out. Meanwhile, Lewis Hamilton is out on a long run, completing 10 laps. His times were around the 1m21s but the latest ones have dropped into the 1m23s.

  58. 1041: 
    LATEST LAP TIMES

    1 Sebastian Vettel (Red Bull) 1m18.789s

    2 Kimi Raikkonen (Lotus) 1m19.157s

    3 Jean-Eric Vergne (Toro Rosso) 1m19.361s

    4 Lewis Hamilton (Mercedes) 1m19.575s

    5 Sergio Perez (McLaren) 1m19.696s

    6 Esteban Gutierrez (Sauber) 1m19.765s

    7 Valtteri Bottas (Williams) 1m20.674s

    8 Jules Bianchi (Force India) 1m22.108s

    9 Charles Pic (Caterham) 1m23.562s

    10 Luiz Razia (Marussia) 1m28.067s

  59.  
    GET INVOLVED

    Tom, via text: "Best season surely '94; that's what got me hooked. The tragedy of Imola, a sport in turmoil, improvised safety measures, a Benetton that was (ahem) 'curiously' fast, disqualifications, bans and a plucky Brit fighting to the last!"

  60. 1050: 

    Jules Bianchi has been chipping away at his lap times in the Force India, with his latest a 1m22.108s after just 13 laps. Still no word on who will be Paul di Resta's team-mate for the coming season, although a number of names have been bandied around - Bianchi, Adrian Sutil, Kamui Kobayashi and Bruno Senna among them.

    Who would you like to see on the grid this season? Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  61. 1056: 
    Jerez

    Has to be said, there are some really lovely photographs to be had at the Jerez circuit. This is Lewis Hamilton whizzing round the circuit in the early morning sun.

  62. 1058: 

    Jules Bianchi improves again with 1m20.585 in the Force India while Sergio Perez clocks the third fastest time of the day so far with 1m19.198s.

  63.  
    GET INVOLVED

    Daniel Cernuschi on Twitter: "Kamui Kobayashi would be a great driver for Force India, and he really deserves a seat after last years performance."

    Zaki Mangalji on Twitter: "It would be nice if Kobayashi was signed. He wasn't consistent, but his drive in Japan was amazing. He fended off a Mclaren after all."

    Mandi Nicholson on Twitter: "It would be great to see Bruno Senna in the other Force India next season, he has so much more to give to the right team, I think."

    Who would you like to see complete the 2013 driver line-up? Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  64. 1103: 

    Esteban Gutierrez and Lewis Hamilton going toe-to-toe in the battle to complete the most laps. They are both 38 down already and Gutierrez moves top of the timesheet with his latest effort, steering the Sauber round the Jerez circuit in 1m18.669s.

  65. 1104: 

    Right, time to catch up with BBC F1 technical director Gary Anderson, who is out and about having a closer look at what is happening on the circuit...

  66.   
    BBC F1 technical analyst Gary Anderson in Jerez

    "I'm out on the track watching the cars and it looks like the Red Bull has 10% more downforce than anything else. The McLaren still has constant understeer through the corners, the Mercedes has understeer on entry and then the rear snaps on exit, while the Lotus looks well balanced. The Ferrari is in the pits having its gearbox changed so we can't get a comparison with that."

  67.  
    GET INVOLVED

    Alex, via text: "I know he doesn't seem to be in contention, but I think Vitaly Petrov should be put into the hat for the force India seat. Quick driver and end of last season had the upper hand on Heikki Kovalainen, a highly rated driver by most."

    Tom, via text: "It won't be Bruno Senna. He's confirmed to do Le-Mans with the Aston Martin team. Kamui Kobayashi doesn't have the money for the seat, so its between Adrian Sutil and Jules Bianchi. I hope they give it to Jules, he's very deserving of the position!"

  68. 1112: 

    Sebastian Vettel, out with hard tyres on the Red Bull, moves top of the pile with 1m18.565s, edging him ahead of Esteban Gutierrez by 0.104 seconds.

  69.  

    BBC Sport chief F1 witer Andrew Benson on Twitter: "Sebastian Vettel does a 1:18.565 on hards at same time as Kimi Raikkonen does a 1:18.915 on mediums. No fuel-load data, of course."

  70. 1118: 

    Fernando Alonso putting my 20-minute, once weekly jogs to shame with another update on what he is up to on his week of physical conditioning. The Ferrari driver tweets: "1 hour bike warm up, follow by running 1 hour 39 minutes - 19km."

  71.  
    GET INVOLVED

    Olly, via text: "Heikki Kovalainen, in my opinion, deserves one last shot in competitive machinery. I know he had his time at Renault and McLaren, but he was used as a test hamster for Lewis Hamilton in 2008, and the car was useless in 2009. He is an ROC Champion after all."

  72.   
    Andrew Benson, Chief F1 writer

    "One F1 regular who is not in Jerez this week - or on the F1 grid this year, for that matter - is Finnish driver Heikki Kovalainen. The former Renault and McLaren driver - who won the 2008 Hungarian Grand Prix - has lost his Caterham drive, a victim of the difficulty teams are having finding money, and the rise of what is known as the 'pay driver' - people who bring money to a team in return for racing. Lewis Hamilton is among those who regrets Kovalainen's exit. "I was thinking it's such a shame Heikki's not here," the Mercedes driver said, "and when I see some of the people who have seats, whoever gave them the seats are crazy to think they are better than Heikki. He has great calibre and experience and he deserves to be here."

  73. 1124: 
    LATEST LAP TIMES

    1 Sebastian Vettel (Red Bull) 1m18.565s

    2 Esteban Gutierrez (Sauber) 1m18.669s

    3 Kimi Raikkonen (Lotus) 1m18.915s

    4 Sergio Perez (McLaren) 1m19.198s

    5 Lewis Hamilton (Mercedes) 1m19.291s

    6 Jean-Eric Vergne (Toro Rosso) 1m19.331s

    7 Valtteri Bottas (Williams) 1m20.426s

    8 Jules Bianchi (Force India) 1m20.585s

    9 Charles Pic (Caterham) 1m23.562s

    10 Luiz Razia (Marussia) 1m28.067s

  74. 1129: 

    Sergio Perez knocks two tenths of a second off his previous best to dip under 1m18s, clocking 1m18.944. He has already improved on the time he set in his first full run as a McLaren driver on Wednesday, which was 1m19.572s.

  75. 1136: 

    Lewis Hamilton, Sebastian Vettel and Jules Bianchi are the only drivers out on the circuit at the moment. Hamilton has 50 laps under his belt and I would imagine he will consider passing the 100 mark without a hitch as a pretty successful day of testing.

  76.  
    GET INVOLVED

    Murray on Twitter: "Force India: Julian Bianchi. Fresh talent is the very lifeblood of the sport. Bruno Senna, Vitaly Petrov and Kamui Kobayashi have all had their chance."

    Sash on Twitter: "Would love to see Adrian Sutil back in the Force India, one of the most underrated drivers out there needs a second chance."

    Bill Williams on Twitter: "Kamui Kobayashi without a doubt - faster, more entertaining and a much more humble man."

  77.  

    Caterham on Twitter: "Lunch in Jerez and Charles Pic has 38 laps on the board. We're well into the planned test program & now working on aero configurations."

  78. 1143: 

    Lewis Hamilton, on the medium compound, is up to third on the timesheet, clocking 1m18.905s and taking the total number of drivers inside the 1m18s times to five.

  79. 1148: 
    RED FLAG

    The red flag is out once again but not completely sure as to why yet. Doesn't appear to be a car issue but seems as though there is some debris on the track.

  80. 1150: 

    That was brief. After marshals zoned in on where the debris was we are up and running again.

  81. 1152: 
    RED FLAG

    Red then green then red again. The oddities of testing! Where the debris was there is now a bit of a hole near the kerb, not something a driver would fancy trundling over I'd imagine.

  82.   
    BBC F1 technical analyst Gary Anderson in Jerez

    "This latest red flag is because of kerb break-up between Turns 10 and 11. A large pot hole has developed where the cars run wide over the kerb there (you can see this happening in the film we made on Thursday assessing the cars). If the session is re-started, the drivers will have to stay on the track, which will reduce the racing line by about a car's width."

  83. 1202: 

    So as things stand, testing can't continue until that hole is dealt with. Looks like it is a couple of centimetres deep, someone needs to mix up some quick drying cement sharpish! In the interim, I'd suggest this is as good a time as any to pop the kettle on and grab a bite to eat.

  84.  

    Rachel T on Twitter: "As I regularly avoid large craters in the road in the UK, it's nice to know that F1 isn't immune to pot holes!"

  85.  

    Steve, via text: "If you look at where the pot hole is there will a small area on that part of the kerbing saying made in England."

  86. 1214: 

    Lots of milling around and head scratching going on at the moment. Any one think of what is the most bizarre or unusual incident to have disrupted a Formula 1 event?

    Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  87. 1219: 
    LATEST LAP TIMES

    These were the latest lap times before that red flag incident:

    1 Sebastian Vettel (Red Bull) 1m18.565s

    2 Esteban Gutierrez (Sauber) 1m18.669s

    3 Lewis Hamilton (Mercedes) 1m18.905s

    4 Kimi Raikkonen (Lotus) 1m18.915s

    5 Sergio Perez (McLaren) 1m18.944s

    6 Jean-Eric Vergne (Toro Rosso) 1m19.331s

    7 Valtteri Bottas (Williams) 1m20.426s

    8 Jules Bianchi (Force India) 1m20.585s

    9 Charles Pic (Caterham) 1m21.919s

    10 Luiz Razia (Marussia) 1m25.796s

  88.   
    BBC F1 technical analyst Gary Anderson in Jerez

    "Repairs are under way at the damaged kerb between Turns 10 and 11. Marshals are trying to bolt a couple of rubber kerb sections over the hole. Personally, I would fill the hole with quick-drying cement and advise the drivers not to cross the kerb."

  89.  
    GET INVOLVED

    Matt Claypole on Twitter: "Austria maybe 2001 or 2002? There was a deer on the track during practice, when Juan Pablo Montoya was told he replied "Oh deer" classic JPM."

    Ben Ashcroft on Twitter: "1999 European Grand Prix. Almost every driver made a false start. Never seen anything like it before."

    Craig Stevanto on Twitter: "Montoya running over a loose drain in Turkey (2005) caused him to retire and the Safety Car to come out."

  90. 1232: 

    Rubber kerbing appears to have been abandoned in favour of the quick-drying cement. It is a bit like a scene on the stretch of motorway I travel on at the moment.

  91.  
    GET INVOLVED

    Daniel, via text: "How about the British Grand Prix when that crazy guy dressed as a leprechaun ran onto the track (I forget what year it was). That must be up there with unusual incidents to disrupt a grand prix."

  92. 1239: 

    So while cement seems to be the chosen solution, there has to be a question mark over whether we will see any more testing today. I'm no cement drying expert but can't imagine it will be dry to an acceptable standard any time soon.

  93. 1247: 

    OK my cement-drying knowledge has been well and truly shown up as we are back under way again.

  94.   
    BBC F1 technical analyst Gary Anderson in Jerez

    "The longer this test has continued, the more it looks as though Jenson Button's fastest time of 1:18.8 in the McLaren on the first day was very reasonable indeed. Red Bull's Sebastian Vettel has beaten it by 0.3secs on the final day but the track has four days' worth of rubber on it now, so should be considerably quicker. The fastest time of all remains Felipe Massa's 1:17.8 on Thursday in the Ferrari. But it's very difficult to cross-reference because of the highly abrasive surface at Jerez. Car characteristics also come into the equation. You'd expect the soft tyre to be about a second quicker than the hard. But the softer the tyre, the more understeer it generates in the car. And as the Ferrari seems to have oversteer the soft would be a good tyre for it. Likewise, the Mercedes has understeer, so the harder tyres would be better for it. But the harshness of the track means that while the soft will give an initial grip advantage, it will probably go away before the end of a single flying lap. Equally, the teams agree that because of the abrasiveness of the circuit, the hard tyre is actually a very good tyre for these conditions. And then there's the fact we don't know the fuel loads."

  95. 1300: 

    Good news for Ferrari as Pedro de la Rosa heads back out onto the circuit following the gearbox troubles he had in the morning. Jules Bianchi, meanwhile, records his best personal best of the day with 1m19.689s.

  96. 1305: 

    Pedro de la Rosa heads back in after an installation lap. The Spaniard, cheered on by a number of local fans in Jerez today, is the only driver remaining to clock a timed lap and, all being well, we should be seeing that come in the not too distance future.

  97.  
    GET INVOLVED

    Mark, via text: "Monaco, can't remember when, a fire at Hotel was put out but led to large amounts of water dripping onto the track inside the tunnel causing the start to be delayed."

    Dan, via text: "Gotta be Monaco 09 when Rubens Barrichello threw his steering wheel out after breaking down, with Michael Schumacher then proceeding to run over it."

    Paddy, via text: "For me, it's got to be Sebastien Buemi's front suspension failure and both front wheels exploding off simultaneously in china. Buemi trying to steer out with no front wheels. Hilarious!"

    What is the most unusual incident to have affected an F1 event? Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  98. 1312: 

    Jules Bianchi leaps to the top of the timesheet by clocking 1m18.175s in the Force India, more than three tenths of a second faster than Sebastian Vettel. Pedro de la Rosa is back out again for Ferrari with three hours remaining of the session, provided that quick-drying cement does the trick...

  99. 1314: 

    ...and Pedro de la Rosa pops his name on the timesheet for this first time, slotting in 10th fastest with 1m25.356s.

  100.  

    Robin Denton on Twitter: "Good to see Pedro de la Rosa still involved with the top teams, such a giant well of information and experience."

  101. 1319: 

    Williams plan to spend the afternoon session focusing on various tyre runs with Valetteri Bottas, who got over 30 laps in during the morning session.

  102.   
    Andrew Benson, Chief F1 writer

    "It has been a winter of change at Williams, the only team not to have a 2013 car at this test. Executive chairman Toto Wolff has left to become Mercedes' director of motorsport, and a management position in the F1 team, although he remains a Williams shareholder, while chief operations engineer Mark Gillan, the team's lead at the races, also left before Christmas. Both men were big supporters of new driver Valtteri Bottas, Wolff as his manager and Gillan as an admirer who was instrumental in getting him a promotion from reserve driver. But Bottas says he is not concerned. 'Toto did some good things, as well as Mark, at Williams,' the Finn said. 'It is a shame to see they're going but I think we have a good team still. Everything is well organised and everything has run really well. There have been some changes but I don't see any problems with that.'"

  103. 1323: 

    Good news Formula 1 testing fans, that earlier suspension due to the track damage means we get an extra 30 minutes of testing time, now finishing at 1630GMT.

  104. 1327: 
    LATEST LAP TIMES

    1 Jules Bianchi (Force India) 1m18.175s

    2 Sebastian Vettel (Red Bull) 1m18.565s

    3 Esteban Gutierrez (Sauber) 1m18.669s

    4 Lewis Hamilton (Mercedes) 1m18.905s

    5 Kimi Raikkonen (Lotus) 1m18.915s

    6 Sergio Perez (McLaren) 1m18.944s

    7 Jean Eric-Vergne (Toro Rosso) 1m19.331s

    8 Valtteri Bottas (Williams) 1m20.426s

    9 Charles Pic (Caterham) 1m21.919s

    10 Pedro de la Rosa (Ferrari) 1m23.188s

    11 Luiz Razia (Marussia) 1m25.796s

  105. 1336: 

    Lewis Hamilton is well on course to pass 100 laps for the day having just completed his 70th run round the Jerez circuit in the Merecedes.

    The Briton has been speaking about how the day has gone so far: "It's been good to get some laps in. Obviously yesterday Nico (Rosberg) got 148 laps in. I think that's the most I've ever seen. Today to get some running in it's great to get a feeling for the car. We have some work to do but it doesn't feel like it's a disaster."

    As for how the car feels, Hamilton added: "I feel like we're not starting in a bad place, so it must be a big improvement for them (Mercedes). I feel like it's a good platform, a good foundation to work on. Definitely just going to keep on asking for downforce and hope the guys continue to do a great job back at the factory."

  106. 1340: 
    COMPLETED LAPS

    1. Lewis Hamilton (Mercedes) 70

    2. Esteban Gutierrez (Sauber) 65

    3. Sebastian Vettel (Red Bull) 56

    4. Sergio Perez (McLaren) 56

    5. Charles Pic (Caterham) 54

    6. Jules Bianchi (Force India) 50

    7. Luiz Razia (Marussia) 50

    8. Jean-Eric Vergne (Toro Rosso) 48

    9. Valtteri Bottas (Williams) 39

    10. Kimi Raikkonen (Lotus) 36

    11. Pedro de la Rosa (Ferrari) 11

  107. 1343: 

    Relatively quiet on the circuit now with the lap-hungry Pedro de la Rosa pounding the circuit, along with Sergio Perez, Esteban Gutierrez, and Charles Pic. No driver seems overly concerned with that patched-up pot hole by the way.

  108.  

    Marussia on Twitter: "Back up and running and Luiz Razia picking up on race distance work."

  109.  
    GET INVOLVED

    Nigel, via text: "When I marshalled the Canadian GP in 2003 I discovered a stud buried into the Tarmac & it was sticking up by about 3/4" just off the racing line. This was on the morning of the race & we had to get one of the circuit maintenance crew to come out to our post & cut it down to ground level with an angle grinder before the race could commence."

  110. 1355: 
    McLaren's Sergio Perez

    Sergio Perez has had plenty of time in the McLaren during his two days of testing. After clocking 81 laps on Tuesday he has surpassed 60 today and is out on a long run at the moment.

  111.  
    GET INVOLVED

    Tom, via text: "Please, please, please make special mention of Taki Inoue getting run over by the medical car at Hungaroring while trying to extinguish a fire that had started in his car! The look he gives the driver before collapsing in shock is priceless."

  112.  

    BBC Sport chief F1 writer Andrew Benson on Twitter: "Ross Brawn: There is an awful lot to do. We need to quietly get on with it, not panic and make sure we do things in the right way."

  113. 1404: 

    Kimi Raikkonen is up to second fastest with his latest timed lap of 1m18.326s on the soft tyres putting him 0.151 seconds behind Jules Bianchi's best. Will we see a sub-1m18s time today?

  114. 1413: 

    Five cars out on the circuit at the moment with Pedro de la Rosa on a nine-lap run with Lewis Hamilton, Sergio Perez, Esteban Gutierrez and Luiz Razia for company. De La Rosa's best time so far is 1m23.188s, putting him 10th on the timesheet.

  115.   
    Andrew Benson, Chief F1 writer

    "Mercedes team boss Ross Brawn has been talking to the media about his first experience of working with Lewis Hamilton at the track. 'It's still very early in terms of understanding what he wants from a car perspective, and of course we're at one circuit for one day,' Brawn said. 'He's clearly a person who enjoys being involved at all levels and that's a great motivation for the team. He's been working hard with the engineers this test, he's been here on the days when Nico's been driving with a headset and listening what's been going on, so everything I hoped he would be.' Brawn said optimism in the team was 'reasonably strong', adding: 'There is an awful lot to do but both drivers are putting a lot energy into the team. We know what happened last year; we know what we need to do this year. We need to quietly get on with it, not panic and make sure we do things in the right way.'"

  116.  

    Sauber on Twitter: "A little less than two hours to the end Esteban Gutierrez is doing long runs in order to get used to the new tyres. Almost 100 laps completed."

  117. 1431: 

    Jules Bianchi has had his last run in the Force India for today, with the Frenchman handing over to Paul di Resta, who heads out for the last two hours of testing. Bianchi leaves the circuit having clocked the best time of the day so far, 1m18.175s.

  118. 1435: 

    Pedro de la Rosa is about to embark on his 30th lap in the Ferrari, pretty good going in little under two hours, and he has just set a new personal best with 1m20.316s moving him to eighth on the timesheet.

  119. 1440: 

    Esteban Gutierrez is out doing a full race simulation at the moment and is 42 laps to the good, with his times dropping away from 1m24s to 1m27s. Gutierrez is the first driver to surpass 100 laps for the day, but he won't be the last. Lewis Hamilton is closing on that figure with the Briton also out on a similarly lengthy run and has completed 84 laps overall today.

  120. 1449: 
    Red Bull's Sebastian Vettel

    Reigning world champion Sebastian Vettel deep in discussion with Tim Malyon, Red Bull's performance engineer. Red Bull have been super secretive during this week of testing. Every time the car has gone back into the garage barriers are immediately erected to shield it from nearby photographers.

  121.  
    GET INVOLVED

    David Tyrrell on Twitter: "Last day of testing. Most teams looking very good, few hiccups here and there but all in all looking to a be a good session!

    Nishil on Twitter: "Can't wait for the first race of the season. Ferrari looks decent and who knows what could happen with Fernando Alonso behind the wheel."

  122.  

    Jenson Button on Twitter: "Another good day cycling as Sergio Perez is in the MP4-28 today. Now back in the paddock catching up on the action."

  123. 1453: 

    Lewis Hamilton ticks off his 100th lap for the day. Nice one work for Mercedes, coupled with Nico Rosberg's sterling work on Thursday, they have racked up 248 laps in two days and still counting.

  124. 1457: 

    Valtteri Bottas, on the soft tyres, clocks a personal best of 1m19.851s to go eighth fastest, replacing Pedro de la Rosa, who himself had just chalked up a personal best of 1m20.316s.

  125. 1502: 

    The true cost of being at the tail end of four days of testing is being counted in the Williams and Lotus garages, with the two teams reporting a worryingly low supply of snack-based products. That extra 30 minutes of testing, while great for us observers, also means some teams have a bit of race on to get to the airport in time.

  126. 1505: 

    Lewis Hamilton is back in the pits after a 20-plus lap stint on hard tyres. Kimi Raikkonen trades places with the Briton on the circuit, with Lotus planning to send the Finn out with the intention of completing plenty of laps in the final 90 minutes, having had a relatively low amount of time on the circuit so far on day four.

  127. 1506: 

    Lewis Hamilton has given a cautiously optimistic assessment of his new Mercedes after his first proper run in the car in pre-season testing. Read his thoughts on the BBC Sport website.

  128. 1509: 

    Kimi Raikkonen goes quickest of all today with 1m18.148s enough to sneak ahead of Jules Bianchi, who is now back in the Force India motorhome with Paul di Resta out in his place for these latter stages. Di Resta's best time so far is 1m23.435s, putting him 11th fastest.

  129. 1515: 
    LATEST LAP TIMES

    1 Kimi Raikkonen (Lotus) 1m18.148s

    2 Jules Bianchi (Force India) 1m18.175s

    3 Sebastian Vettel (Red Bull) 1m18.565s

    4 Esteban Gutierrez (Sauber) 1m18.669s

    5 Lewis Hamilton (Mercedes) 1m18.905s

    6 Sergio Perez (McLaren) 1m18.944s

    7 Jean-Eric Vergne (Toro Rosso) 1m19.331s

    8 Valtteri Bottas (Williams) 1m19.851s

    9 Pedro de la Rosa (Ferrari) 1m20.316s

    10 Charles Pic (Caterham) 1m21.919s

    11 Paul Di Resta (Force India) 1m23.435s

    12 Luiz Razia (Marussia) 1m24.408s

  130. 1518: 

    Kimi Raikkonn heads back into the pit lane, swaps the soft for the medium compound and he is back out again, joining Lewis Hamilton, Paul Di Resta and Sergio Perez on the circuit.

  131.  
    GET INVOLVED

    So as we approach the last hour of the final day of the first pre-season test, what do you feel you have learnt about the teams and drivers for 2013?

    Let us know on Twitter: #bbcf1 and on text: 81111 (UK only).

  132. 1524: 

    Some interesting thoughts from Mercedes boss Ross Brawn on what it is like working with Lewis Hamilton: "He's clearly a person who enjoys being involved at all levels and that's a great motivation for the team. He's been working hard with the engineers this test. He's been here on the days when Nico's been driving with a headset and listening to what's been going on, so [he has been] everything I hoped he would be."

  133.  
    GET INVOLVED

    Adam Sewell on Twitter: "That this year, although largely a stop gap until 2014, may still turn out to be pretty close and exciting...I hope."

  134. 1534: 

    Lewis Hamilton just flung the Mercedes round the Jerez circuit for the 121st time today - the most of any driver. Reliability concerns seems to have been firmly allayed, although Hamilton's earlier comments suggest there is still plenty of work to do on the WO4.

  135. 1537: 

    Have the drivers been steering clear of that patched-up pot hole? Not a chance. Cars have either gone over or pretty close to where the quick-dry concrete has been put in, kicking up dust and what not as they did.

  136.  
    GET INVOLVED

    Daniel Knight on Twitter: "I have learnt that it's going to be tough telling Rosberg/Hamilton apart with yellow headgear in the Mercedes. Button Red 5....nice throwback to Mansell era."

    Ian Sykes-Beaumont on Twitter: "It may be early but I think Lotus could be a real contender this season, especially with the iceman at the wheel."

    Bill Williams on Twitter: "Once again the Lotus looks promising but they will need some big early points to challenge the big three's development over the year."

  137. 1542: 

    Have had a few requests for the total laps done by each team over the course of the four days of testing. I'll collate these and post them at the end of this test, so stay with this live text to find out.

  138. 1546: 
    LATEST LAPS COMPLETED

    1 Lewis Hamilton 128

    2 Esteban Gutierrez 123

    3 Charles Pic 98

    4 Sebastian Vettel 86

    5 Sergio Perez 82

    6 Luiz Razia 75

    7 Kimi Raikkonen 73

    8 Jean-Eric Vergne 72

    9 Valtteri Bottas 67

    10 Jules Bianchi 56

    11 Pedro de la Rosa 39

    12 Paul di Resta 29

  139. 1549: 

    Brief spell of silence in Jerez with no cars on the track before Valtteri Bottas and Jean-Eric Vergne venture out once again. Just under 45 minutes remaining of the first pre-season test.

  140.  
    GET INVOLVED

    Tristan, via text: "40 minutes for Lewis Hamilton to beat Nico Rosberg's amazing 148 laps from yesterday!"

  141. 1559: 

    Sebastian Vettel, third fastest today, has just completed five laps with each of his times at or around the 1m24s mark. It has been unassuming stuff from the Red Bulls over the last four days, with no major show of pace but also no major issues reported with the RB9.

  142. 1604: 

    The circuit is the busiest it has been for a while now with a plethora of drivers heading out to take the on-track total to eight. Jean-Eric Vergne leaps up to fifth fastest as he goes round in 1m18.760s, dropping Lewis Hamilton down to sixth.

  143.  
    GET INVOLVED

    Henry, via text: "Looking rather good for Lotus and McLaren! Ferrari appear to be alright too."

    Chris, via text: "Unfortunately it looks as if Caterham and Marussia have not made any progress up the grid."

  144.  

    Caterham on Twitter: "That's the 100 lap mark broken for Charles Pic who continues to circulate with just under 20 minutes left of day four."

  145. 1619: 

    Luiz Razia sets a new personal best with 1m21.226s and that is enough to lift him above Paul di Resta on the timesheet and into 11th. Into the last 15 minutes, will we see anyone better Kimi Raikkonen's time? Will Lewis Hamilton surpass 150 laps for the day?

  146.  
    GET INVOLVED

    Gul, via text: "Weird seeing Sergio Perez in that McLaren, keep thinking its Lewis Hamilton-who is doing well in that Merc! 2013 will be an exciting year! Keep an eye on Lewis!"

  147. 1627: 

    Valtteri Bottas out for one final run in the 2012 Williams - the team will launch their 2013 car in Barcelona. Less than five minutes left...

  148.  
    GET INVOLVED

    Rachel, via text: "Testing is vitally important to get the mechanics right, but you can't overstate how important the skill of the driver is. Just look at how the dreadful 'can't-keep-it-on-the-track' Ferrari was propelled to 2nd in the hands of Fernando Alonso. Mercedes, too, have this bonus in Hamilton."

    Allan, via text: "You learn nothing from testing about teams or drivers. All you can do is speculate about who may do what but that will be either confirmed or disproved at Melbourne day 1 of the season."

  149. 1632: 
    CHEQUERED FLAG

    KIMI RAIKKONEN IS FASTEST ON THE FOURTH AND FINAL DAY OF THE FIRST PRE-SEASON TEST IN JEREZ

  150. 1634: 

    So no-one could put together a quicker lap than Kimi Raikkonen's 1m18.148s before the chequered flag, so the Lotus man finishes fastest on day four. Felipe Massa, though, was the fastest overall this week with his 1m17.879s on day three in the Ferrari.

  151. 1637: 
    FINAL LAP TIMES

    1 Kimi Raikkonen (Lotus) 1m18.148s

    2 Jules Bianchi (Force India) 1m18.175s

    3 Sebastian Vettel (Red Bull) 1m18.565s

    4 Esteban Gutierrez (Sauber), 1m18.669s

    5 Jean-Eric Vergne (Toro Rosso) 1m18.760s

    6 Lewis Hamilton (Mercedes), 1m18.905s

    7 Sergio Perez (McLaren), 1m18.944s

    8 Valtteri Bottas (Williams), 1m19.851s

    9 Pedro de la Rosa (Ferrari), 1m20.316s

    10 Charles Pic (Caterham), 1m21.105s

    11 Luiz Razia (Marussia), 1m21.226s

    12 Paul di Resta (Force India), 1m23.435s

  152. 1640: 
    COMPLETED LAPS

    1 Lewis Hamilton (Mercedes) 145

    2 Esteban Gutierrez (Sauber) 142

    3 Charles Pic (Caterham) 109

    4 Sergio Perez (McLaren) 97

    5 Sebastian Vettel (Red Bull) 96

    6 Jean-Eric Vergne (Toro Rosso) 92

    7 Valtteri Bottas (Williams) 91

    8 Kimi Raikkonen (Lotus) 82

    9 Luiz Razia (Marussia) 81

    10 Jules Bianchi (Force India) 56

    11 Pedro de la Rosa (Ferrari) 50

    12 Paul di Resta (Force India) 49

  153.  
    GET INVOLVED

    Chris, via text: "So good to hear that Lewis Hamilton has put in a monster amount of laps today! Live reporting feed in the office for the win!"

  154. 1643: 

    Right, as promised, I'm going to have a crack at working out the total number of completed laps by the teams in Jerez this week. Stick with me, just dusting off the calculator now...

  155.  

    Force India on Twitter: "Nice work by Jules Bianchi today with 56 laps completed in VJM06 and P2 on the timesheets. A positive end to our Jerez test."

  156. 1657: 
    TOTAL COMPLETED LAPS

    Here are the unofficial completed total laps per team.

    1 Sauber 430

    2 Red Bull 372

    3 Force India 357

    4 Williams 332

    5 Toro Rosso 330

    6 Mercedes 319

    7 Caterham 318

    8 McLaren 298

    9 Ferrari 277

    10 Lotus 271

    11 Marussia 219

  157. 1702: 

    And with that all that is left for me to do is wrap up this live text commentary on the first pre-season test in Jerez. It has been a hugely enjoyable four days and I don't know about you but I consider my appetite very much whetted for the season ahead. Stay on the BBC Sport website for Andrew Benson's report, plus reaction from Spain. Thanks for your contributions and cheerio for now.

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