Lewis Hamilton finishes fastest
Perre Gasly does the most laps with 147
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Plenty of you predicting big things for McLaren this season so let's turn this into a predictions for the season topic.
Are you predicting McLaren to win this season and if so which race do you expect to see them on the top step? Who do you think the top three teams will be and which driver do you expect to spring the biggest surprise?
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And it's the Sauber that's brought out the red flag. Marcus Ericsson has gone off at Turn 2.
Recovery trucks assemble.
RED FLAG.
There's only two cars on the track - a Sauber and a McLaren...
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Sean J: Agree with Ben [see 08:34 GMT] on McLaren being closer but think it will be a few races before we see it. Hope they can stir up the top 3
Bobby: I’m going to second Ben’s comment earlier and go as far as saying I’ll be very surprised if McLaren don’t grab a win! Minimum a podium this season.
Andrew Benson
BBC Sport’s chief F1 writer
Wednesday was probably about the worst and most useless day of pre-season testing for years.
Only five drivers ventured out, only three did more than one lap, and only one - Fernando Alonso - set a lap time. In the context of the test, it was no surprise McLaren chose to run the most, even if it was only 11 laps. They have had a difficult test, with reliability problems on each of the first two days, and even frigid wet mileage was worthwhile for them.
“We still had some checks to do on the car as it’s very early days for us with this new package,” Alonso said, “and we are learning things with every lap. In the few laps we did at the end of the day we managed to collect some good data for future development, so even with the little running we could complete, the information we got is very positive. I’m happy that despite a difficult day of testing for everyone, we made the best of it.”
But Stoffel Vandoorne's had enough of that club. He's all about the 1:40s as he does a 1:49.497.
Thirteen laps so far for the McLaren, more than anyone else. I get the feeling they're going to be high up on the lap counter today.
Marcus Ericsson joins Stoffel Vandoorne in the 1:50s club, clocking a 1:54.156.
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Kayleigh: I think the important question for today is how will Gary cope with no lunch break?!
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Dan Knutson
F1 journalist in Barcelona
Even though there was virtually no on-track action yesterday, the teams worked, as usual, late into the night. The lights were on upstairs and the engineers and drivers were discussing things in the Williams engineers’ offices. Work was going on below as well.
I spotted Robert Kubica in there talking with the engineers. He has been spending long days at the track. For example, he left the circuit at nearly midnight on Tuesday and was back at 7:20 a.m. the next day.
“I am not going to the hotel to chill out,” he said. “I have to balance it as I cannot get in the car tired and not concentrate. But I’m looking forward to seeing if we can improve things and get knowledge with things.”
Andrew Benson
BBC Sport’s chief F1 writer
The teams really have to make this day count. Even before Wednesday’s almost complete write-off with snow and the rest of it, this test has been difficult for the teams, with unusually cold weather making it difficult to get tyre temperature and therefore to learn about the cars.
This final day of the first test the weather forecast is not so bad. It should be much warmer - as much as 15C - and although showers are predicted, there should be time for some decent running.
Some teams need it more than others - looking at you, McLaren - but even Mercedes have so far done only a third of the amount of laps they managed by this point last season.
Sergey Sirotkin and Kevin Magnussen head in without setting a time but Stoffel Vandoorne is back out there and lowers the benchmark to 1:55.018.
Here's Marcus Ericsson having a splash about a little earlier.
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Only the briefest of silences, however, as Sergey Sirotkin and Kevin Magnussen emerge.
Marcus Ericsson improves slightly with 2:06.837 and the track falls silent.
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Ben: Good morning. I am pretty convinced McLaren will not be far from the big three this year.
Ben going big already.
Dan Knutson
F1 journalist in Barcelona
What a difference a day makes.
That’s the back straight up behind the trees, yesterday morning and 24 hours later.
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Valtteri Bottas heads in following his installation lap leaving Marcus Ericsson as the only driver out there.
With the track to himself, Ericsson promptly puts in a time - a slow and steady 2:07.926.
A cumulative total of 20 laps completed by the drivers this morning, already three more than they managed all day yesterday.
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I would love to have your thoughts on all things F1 so, like Josephat below, feel free to tweet in on #bbcf1 or text to 81111 (UK only).
As we approach the end of the first test what - if anything - have you learned?
With the amount of testing time we've lost due to the weather, what do you think would be a better location?
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Josephat Okora: Looks like @McLarenF1, external wants to get the maximum mileage today.