Jerez first 2015 test Test day two

19:14

Sebastian Vettel

Here's our full report on today's action. Our reporters are out in the paddock now getting the reaction to the day, so keep an eye on autosport.com for more of the stories behind what happened on day two.

REPORT: Vettel fastest again before rain hits

That's it from AUTOSPORT Live for today - we'll see you at 7.45 UK time tomorrow morning for day three, and maybe some more SAUBER FACTS.

19:02 That's the end of the second day's running here at Jerez. Ferrari power leads the way again with Vettel fastest from Nasr's Sauber.

Mercedes again tops the lap-count, with Lewis Hamilton managing 91 laps before a water leak curtailed his running.

Troubled times continue for McLaren-Honda...

18:56 Verstappen is back in the pits again, so it's just the two Ferrari-powered cars circulating as we enter the final four minutes of day two's running.

18:53 Vettel pops the Ferrari into the 1m35s as the sun returns to Jerez at last. He's clocked 83 laps now on his second day in the SF15-T.

18:51 Vettel gets straight down into the 1m36s on a track that is drying out slowly. Verstappen's in the 1m38s, Nasr in the 1m39s.

18:48 @Lotus_F1Team: "Drivetrain related issue curtailed @Pastormaldo's last run. Wet conditions now at Jerez so ideal opportunity to work on it ahead of tomorrow"

18:47 Vettel has decided he fancies a bit of wet running and heads back out in the Ferrari. Verstappen and Nasr have done the same in the Toro Rosso and Sauber respectively.

18:45 Nasr's had enough too now, so the track is silent once again with just 15 minutes remaining.

18:44 Unsurprisingly, Button returns to the pits straight away and turns off a harsh-sounding Honda engine.

18:43 Button is crawling around in the McLaren. Nasr's Sauber has just flown past.

18:41 Verstappen pits again as the McLaren-Honda fires up and finally heads back out on track with 19 minutes to run.

18:39

Sebastian Vettel

Our pacesetter seems keen to get back out there again - here's Vettel wandering outside the Ferrari garage to do the time-honoured 'does my hand get wet?' weather conditions check.

18:37 Nasr heads back out again after a short interval in the pits. Can still see spray flying up from the rear of the Sauber as it builds up speed so the track is pretty sodden. Verstappen is lapping in the 1m40s now in the Toro Rosso.

18:34 Williams technical chief Pat Symonds has just finished a Twitter Q&A on the team's official account. Here's one of the snippets he revealed:

@WilliamsRacing: "The most visual change between now and the first race will be a new rear wing"

18:33 Verstappen heads back out after a brief stop. Nasr's Sauber has come slowly back into the pits.

18:29 Verstappen decides he's had enough of the rain and dives into the pits. His 1m42s flying lap was still 12s faster than the recalcitrant McLaren-Honda has been round Jerez today...

18:24 Felipe Nasr must be feeling jealous of Verstappen having the wet track all to himself. The Brazilian's Sauber has just joined the fray for a splash about in the final 35 minutes of the session.

18:23 Verstappen is the first driver to head out for a lap in the rain. He's got 59 laps to his name today, but the team has spent a lot of the afternoon working on the car in the garage.

18:20 @MercedesAMGF1: "@WilliamsRacing @ValtteriBottas We may have underestimated the scale of leakage..."

18:17 Lots more blipping of the Honda engine from the McLaren garage at the moment. Button could be one of the few drivers sent out in the wet if the team wants to check that it has fixed the problems that have limited him to just five laps so far.

18:15 @WilliamsRacing: "It's raining so @ValtteriBottas has jumped out. Must be the @MercedesAMGF1 water leak"

18:10 McLaren briefly fires up the Honda engine. The mechanics probably have no idea how much pandemonium that causes in certain over-excitable corners of the media centre every time they do it, as people rush to the window hoping that the MP4-30 is about to hit the track.

18:08 That shower was poorly timed for Toro Rosso in particular - the team had just got Verstappen back on track after a long delay.

18:03 We might not see anyone else go out either now - a huge rain storm has just hit the circuit.

18:01

Lewis Hamilton

Hamilton isn't going back out today:

@MercedesAMGF1: "That'll be us for today - investigations revealed a water leak from a failed part. The crew are now working hard to get the car ready for a return to action tomorrow."

17:50 Former Williams test driver Nasr moves over for Bottas, who is also on soft tyres at the moment.

17:48 Nasr repeats team-mate Ericsson's trick from day one and moves up to second on a set of soft tyres.

Bottas finds six tenths of a second, moving himself up to third.

17:46 BEN ANDERSON tells us that the McLaren MP4-30's bodywork is on stands in the garage, but he reckons the mechanics are getting ready to fire it up soon as they continue to work on the rear of the car.

17:44 Vettel opens this run with a new fastest time through the first sector, but by the end of the lap he's eight tenths down on his best from this morning.

17:40 The track is green again, and Vettel heads straight back out in the Ferrari.

17:40 BEN ANDERSON reports that Maldonado stayed in the Lotus while it was being pushed back to the garage.

17:38 The Lotus is being pushed into the pits by marshals, who appear to have ditched it at the beginning of the pitlane for the mechanics to deal with.

17:36 We have our first red flag of the day. It looks like it's Maldonado stopped on track in the final sector.

17:29 Fans of SAUBER FACTS from earlier will be pleased to hear an update on the team's 2015 test programme so far from BEN ANDERSON:

"Ericsson is much happier with the high speed and braking stability of the C34 compared to last year's car that he drove in Abu Dhabi testing. The team thinks the Ferrari engine has taken a step forward this year as well."

17:25 Another improvement for Bottas takes him into the 1m22s (just) - 1m22.983s.

17:22 Here's a recap of today's headlines so far:

* Vettel fastest during a sequence of fast runs in the morning
* Mercedes leads lap count again but Hamilton stops with water system problem
* Five laps for McLaren so far, but the team is working to get out before the end of the day
* Kvyat runs without a front wing due to damaging the only one Red Bull has
* Lotus E23 makes its debut with Maldonado

17:18 Maldonado sets a new personal best, trimming two tenths from his time to post a 1m25.802s.

17:17 BEN ANDERSON can hear plenty of work going on behind closed doors at the two Red Bull-owned teams: "Spanners clanking at Toro Rosso and fans whirring at Red Bull."

He's also popped along to Lotus, where the team says the E23 is far easier to work on than its troublesome predecessor - both in terms of chassis and engine.

17:15 The Ferrari is quickly into the 1m23s, and it has been joined on track by Maldonado in the Lotus.

17:12 Vettel's started another quick run - the first two laps are a 1m21.8s and a 1m22.2s.