Second pre-season F1 test
Runs from 08:00-17:00 GMT
Stoffel Vandoorne's McLaren stops twice on track
Red Bull also brings out the red flag
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Andrew Benson
BBC Sport’s chief F1 writer
McLaren say they had a power shutdown, which meant they lost data from the car.
They are investigating the cause before sending Vandoorne back out again.
Image source, ReutersPierre Gasly becomes the seventh driver to set a time this morning as he goes fourth quickest in the Toro Rosso, clocking 1:21.653.
Just Kevin Magnussen, Marcus Ericsson and Nico Hulkenberg yet to set a time.
Valtteri Bottas is up to 35 laps now with Max Verstappen also spending plenty of time out on the track this morning. He has 28 laps under his belt.
Apologies, my computer decided to install an update at the most inconvenient time as per but I'm back in the mix again.
During my brief absence Sebastian Vettel went quickest with 1:20.653 on softs but Valtteri Bottas has regained top spot, going just 0.22s quicker. Bottas is also on the softs.
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Tanya Smith: I hope these hiccups are going to be done with in testing then we can have a smooth season. Bad rehearsal =great show.
Honk: I reckon McLaren will be right in among the front runners once they change to a more competitive and reliable engi...oh
1) Bottas 1:20.756 medium
2) Verstappen 1:21.587 soft
3) Vettel 1:23.268 soft
4) Perez 1:23.576 ultrasoft
5) Sirotkin 1:23.869 soft
6) Vandoorne 1:24.773 supersoft
Andrew Benson
BBC Sport’s chief F1 writer
From the outside, McLaren did not have a great test last week. The car was quite high up in the timesheets, but the team focused only on the softest tyres, so its pace flattered. And there were reliability problems, too - a wheel came off on day one and there was overheating in the engine bay on the second. Racing director Eric Boullier said: “This stupid bolt that broke in the exhaust, so (it was) a £2 problem that cost us a lot of track time because everything was burned in the back of the car so we had to rebuild from gearbox to back end. It didn’t cost much to revise the design. It is more about the track time we lost. The design is the same and the car is still running.”
As for why the wheel fell off after six laps for Fernando Alonso on the first morning, Boullier said the wheel nut was not blame. “Not tight enough,” he said. “That’s it. We will have a preventative back-up plan to have some modifications to make sure it does not happen again. The wheel nut got stuck and it broke the hub. That’s why we lost the wheel.”
Boullier said earlier McLaren’s main focus this week will be doing “a race distance”, which he describes as “key”.
The McLaren is off the track and we are green again.
After completing an installation lap early doors, Stoffel Vandoorne didn't return to the track for almost an hour but when he did he set a time before stopping on his ninth lap of the morning.
Kayleigh: Just woken up. Obviously the first thing I do is check #bbcf1, external and see McLaren have stopped on track. Is this the mood for today?!
No need for the recovery vehicle as the McLaren is wheeled back to the garage instead.
Josephat Okora: Oh no, the McLaren has broken down...and I know it's not the engine! The car car just seems delicate.
Stoffel Vandoorne has come to a stop at the start/finish line.
Along trundles the flat-bed truck to recover the stricken McLaren
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Uh oh. The red flag is out and it's not good news for McLaren fans...
What do you want to see in 2018?
Stuie Neale: Competitive racing use of right tyres, Hamilton/Vettel championship I reckon And getting used to 10 past the hour race time
I thought it was only going to be the most fleeting of fleeting appearances from Stoffel Vandoorne but he's staying out for a couple of laps and promptly gets his name on the timing screen with a 1:24.773. He's also not on the hypersofts with that time set on the supersofts.
Stoffel Vandoorne is back out on the tack for the first time in almost an hour.
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It's just NINETEEN days until the first race of the season. How quickly does time fly?
So what do you want to see happen in Formula 1 this year? What would need to happen to make you sit back at the end of November and think 'yep, this has been a cracking season'.
Let us know via #bbcf1 or text in on 81111 (UK only)
Valtteri Bottas heads in after completing lap number 23 for the morning. The Finn has been by far the busiest driver this morning, with Max Verstappen having done the second most amount of laps with 13.
Just an installation lap for McLaren and Haas so far today.
Marcus Ericsson heads out onto the track for the first time this morning meaning we've had the full compliment of drivers out there at some point.
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Andrew Benson
BBC Sport’s chief F1 writer
Some more from Lewis Hamilton. While the evidence of the first test was that Mercedes have the strongest car this year, the 33-year-old says that in an ideal world he would like the competition to close up.
“The closer it is, the better it is when you win,” he says. “You want the guys you are racing to have a level playing field that you can really show that there are only small differences between us as drivers, and you want to be able to show that. It’s magnified if the cars are all the same.”