McLaren under way againpublished at 08:34 Greenwich Mean Time 28 February 2017
Vandoorne has gone back out again so it seems the earlier concerns over the McLaren were a false alarm.
Summary
Raikkonen ends quickest for Ferrari
Hamilton second for Mercedes; Verstappen's Red Bull third
McLaren lose time because of engine change
Williams end running early due to car damage
McLaren under way againpublished at 08:34 Greenwich Mean Time 28 February 2017
A closer look at the Mercedes W08published at 08:30 Greenwich Mean Time 28 February 2017
It may look like Lewis Hamilton has had a nasty collision with several kitchen draining racks but all of these many protuberances on the Mercedes are of course very technical bits of kit.
Above the air intake you can see the aforementioned double T-wing, while behind each front wheel you can see aero rakes, which are used to collect invaluable data relating to airflow around the wheels and in front of the sidepods.
Image source, Getty ImagesPostpublished at 08:25 Greenwich Mean Time 28 February 2017
The T-wings the cars had on show yesterday appear to have been beefed up at Mercedes - with a 'double' T-wing now in evidence on the W08.
More trouble for McLaren?published at 08:21 Greenwich Mean Time 28 February 2017
Dan Knutson
F1 journalist in Barcelona
Image source, Dan KnutsonStoffel Vandoorne did two installation laps in the McLaren. When he came into the pits at the end of the second lap, he stopped at pit entry. The mechanics had to run down and push the car back to the garage.
Hamilton making the early runningpublished at 08:20 Greenwich Mean Time 28 February 2017
Just one car has set a time so far and it is the Mercedes leading the way.
The W08 is already up to eight laps completed in the hands of Lewis Hamilton, although his best time of 1:26.834 is five seconds down on his benchmark time yesterday.
Today's driverspublished at 08:17 Greenwich Mean Time 28 February 2017
Mercedes and Haas aside, it's all change for the teams today as their second drivers get their first outing in anger at the wheel of 2017 machinery.
As yesterday, Lewis Hamilton and Valtteri Bottas will take a session each for Mercedes, with Hamilton up first, while Kevin Magnussen continues for a second successive day in the Haas.
Then we have:
Red Bull - Max Verstappen
Ferrari - Kimi Raikkonen
Williams - Lance Stroll
Force India - Esteban Ocon
McLaren - Stoffel Vandoorne
Toro Rosso - Daniil Kvyat
Renault - Jolyon Palmer
Sauber - Antonio Giovinazzi (The Ferrari test driver is deputising for the injured Pascal Wehrlein )
Postpublished at 08:14 Greenwich Mean Time 28 February 2017
'Plus ca change'published at 08:09 Greenwich Mean Time 28 February 2017
Andrew Benson
Chief F1 writerA massive rule change, much faster cars, different tyres, countless millions spent on research and development and at the end of the first day of testing a Mercedes driven by Lewis Hamilton topped the times after a trouble-free day in which the team managed a gob-smacking 152 laps.
Plus ca change, you might say.
Hamilton, though, said he certainly noticed the difference in the car. The extra downforce stood out, he said, adding that the tyres did not degrade anywhere near like Pirellis have tended to in the past.
The only down side was that he said, after following another car, he felt the predictions of less overtaking would be accurate.
“The cars look fantastic - the wider wheels and body. it is harder to follow so it is going to be harder to overtake. the tyres don’t degrade so it is going to be interesting,” he said.
Image source, Getty ImagesCooler day in storepublished at 08:06 Greenwich Mean Time 28 February 2017
Dan Knutson
F1 journalist in BarcelonaThe weather is cooler today, and cloudy compared to yesterday’s blue skies.
The air temperature is 11.8 C and the track temperature is 12.8 C.
Day one recappublished at 08:05 Greenwich Mean Time 28 February 2017
Image source, Getty ImagesMercedes and Ferrari had impressive starts to pre-season testing as Red Bull and McLaren hit trouble.
Lewis Hamilton was fastest as Mercedes completed 152 laps with both their drivers at Circuit de Catalunya.
Hamilton was 0.113 seconds faster than Sebastian Vettel's Ferrari, which also ran reliably and used the slower medium tyre with the Mercedes on the soft.
By contrast, the mileage of Red Bull and McLaren was limited by recurring reliability problems in Barcelona.
Postpublished at 08:04 Greenwich Mean Time 28 February 2017
Kimi Raikkonen is one of the first to head out in the Ferrari, which racked up impressive mileage in Sebastian Vettel's hands yesterday.
The Williams - also strong yesterday - is today piloted by rookie Lance Stroll and he, too, is straight out on to the track.
Green flagpublished at 08:00 Greenwich Mean Time 28 February 2017
The pit lane is open and we're off again.
Welcomepublished at 07:55 Greenwich Mean Time 28 February 2017
Good morning.
Brought coffee? OK, you can stay.
Day two of pre-season testing in Barcelona will begin in a few moments.
Image source, getty