So another day and another top spot for Sebastian Vettel and his Ferrari. Mercedes look strong, as do Williams but McLaren are in a spot of bother.

How will they all fare tomorrow? You'll have to join me to find out. See you at 08:00 GMT for a third day of testing! Until then, it's good afternoon from me. See ya!

Lotus got some running under their belt after missing the first day yesterday with Pastor Maldonado managing 41 laps. Romain Grosjean will get behind the wheel tomorrow.

Image source, EPA

Williams's Valtteri Bottas was third fastest and chief technical officer Pat Symonds said he was optimistic the team had made progress from 2014.

"Valtteri's comments (about the car) were very positive," said Symonds. "Initial comments do count for quite a lot and I was very encouraged by what Valtteri said.

"I spent a fair amount of time talking to him about the detail of it and it gives me good confidence we have made a step forward and that is a good start to the season."

Speaking about rivals Mercedes' impressive form, Red Bull team principal Christian Horner said: "It's just showing off really - to turn up and do 157 laps is taking the mickey.

"They had a good car last year and have evolved it. They are the benchmark, no doubt about it. We have made good progress and hopefully we can get closer to them."

Image source, Getty Images

It was all going so well for Lewis Hamilton, the world champion following up his Mercedes team-mate Nico Rosberg's impressive 157 laps on day one with 91 of his own before a water leak curtailed his running earlier.

McLaren's struggles continued, meanwhile, with Jenson Button failing to set a representative lap time as he completed just six laps. That's just 10% of the target set by racing director Eric Boullier.

1) Sebastian Vettel (Ferrari) 1:20.984 88 laps

2) Felipe Nasr (Sauber) 1:21.867 + 0.883 89 laps

3) Valtteri Bottas (Williams) 1:22.319 +1.335s 61 laps

4) Lewis Hamilton (Mercedes) 1:22.490 +1.506s 91 laps

5) Max Verstappen (Toro Rosso) 1:24.167 +3.183s 73 laps

6) Pastor Maldonado (Lotus) 1:25.802 +4.818s 41 laps

7) Jenson Button (McLaren) 1:54.655 +33.671s 6 laps

8) Daniil Kvyat (Red Bull) No time 18 laps

Sebastian Vettel's start to his Ferrari career continues to be rosy as he tops the times for the second successive day. The German four-time world champion finished 0.883 seconds clear of Sauber's Felipe Nasr with Williams' Valtteri Bottas third.

Image source, Getty Images

Ferrari's Sebastian Vettel finishes fastest on day two of pre-season testing in Jerez.

Sebastian Vettel is out there splashing about in the Ferrari - but he hasn't got long left. Just five minutes in fact.

Jenson Button manages just one lap before peeling back into the pits. That's his sixth lap of the day, which matches the achievement of his team-mate Fernando Alonso yesterday.

With just under a quarter of an hour to go, McLaren finally send Jenson Button out again...

Lotus have called it a day, too. "Drivetrain related issue curtailed Pastor Maldonado's last run," they tweet. "Wet conditions now at Jerez so ideal opportunity to work on it ahead of tomorrow."

F1 journalist Dan Knutson in Jerez: "Pirelli brought its full range of Formula 1 tyres to Jerez. The hard, medium, soft and super soft compound dry weather tyres - with the orange, white, yellow and red sidewalls.

"Plus the intermediate rain tyres with the green sidewalls, and the extreme wet weather tyres with the blue sidewalls. Max Verstappen has the intermediates on his Toro Rosso as he circulates on the wet track."

Still only Toro Rosso's Max Verstappen and Sauber's Felipe Nasr out on the wet track in Jerez.

With parts limited, teams and drivers will be keen to avoid incidents, such as Red Bull suffered when Daniil Kvyat damaged the front wing earlier today forcing them to limit their running, in wet conditions.

At last, a drive decides to brave the conditions. Toro Rosso's Max Verstappen heads out on a wet track and is soon joined by Felipe Nasr in the Sauber.

It's raining in Jerez and unsurprisingly, everyone has headed for cover in their respective garages.

Sauber's Felipe Nasr improves to a 1:21.867, 0.883 seconds off the pace set by Ferrari's Sebastian Vettel.

Valtteri Bottas is third, Lewis Hamilton fourth, Max Verstappen fifth, Pastor Maldonado sixth and Jenson Button seventh.

Steve Berckmoes:, external Season hasn't even started yet and Lewis already has break down issues.

Image source, Mercedes

That's a shame for Lewis Hamilton, whose opening day of testing is hampered for the second successive year. The Briton didn't manage the mammoth 157 laps his team-mate Nico Rosberg did yesterday, but 91 isn't a bad return. It's still more than anyone else has managed so far today.