Thanks for joining us for that interesting first run out of the weekend under the Singapore floodlights. We're back at 14.30 UK time for FP2.
Free Practice 1
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It's time for lunch for the drivers now at 7.40pm local time!
Vettel shows he means business here in the heat and humidity of the first practice session in Singapore, but the McLaren pair are in the mix.
So the top five from that session was Vettel, Hamilton, Button, Alonso and Maldonado, with the top two over 0.8s faster than any of their rivals.
The session ends with Vettel in the number one slot.
No-one can threaten Vettel at the front now and his soft tyre lap of 1:50.566 will not be beaten in this session now.
Vergne was giving it a real go there but he slipped in the final sector and could not move up from 17th.
An improvement for Button as he moves into third place, but he is still 0.893 behind Vettel.
Perez lost half a second there so he won't be pleased with himself.
Now Perez slides off but he quickly regains control to rejoin the charge over the final minutes.
Vettel is still out there and still pushing it on his final run. The champion remains at the top.
Grosjean had a bit of a moment a couple of minutes ago, slipping off track briefly, but no damage was done and he's back in action straight away.
As the session reaches its final stages it is suddenly getting frantic and there are 20 drivers sharing the track.
Rosberg is registering timed laps but is seven seconds down, so he must be trying out his race trim for Sunday.
Button was on a fast lap but slowed down in the latter sections and remains tenth.
Schumacher meanwhile is in 14th place, 2.42s slower than his young compatriot Vettel.
Alonso makes an improvement to move up to third and remind Vettel and Hamilton he is there, although he is a second off the pace.
Jenson Button by the way is tenth at the moment, nearly two seconds slower than McLaren teammate Hamilton.
Championship leader Alonso is down in seventh and is 1.445 slower than Vettel at this early stage but will aim to improve his pace before the session closes of course.
So Vettel is 0.049 faster than Hamilton, with Maldonado in third around one second down on the German. Webber remains in fourth.
Vettel makes good use some warmed up soft tyres to set a new best time of 1:50.566.
The drivers stay on European timings during this Grand Prix so despite it being just after 19.00 in Singapore they will have 'lunch' between FP1 and FP2 later.
The top of the timing board has a more competitive feel about it now, with Hamilton leading from Vettel, Maldonado and Webber.
Eleven drivers have gone under the 1:53 mark, with 11th placed Räikkönen just over 1.5s behind leader Hamilton.
The sun has set and we're enjoying the sight of a full floodlit circuit.
And then we see Hamilton make a statement to move into first, leading the way by just under 0.2s.
The experienced Aussie Webber moves up into second place just 0.079s behind Maldonado.
With half an hour to go it's getting more interesting on the dry track and Williams' Maldonado has demonstrated his pace with a best time so far of 1:51.576, 0.288 faster than Force India's Nico Hülkenberg.
The drivers are taking turns to lead the way, with Vettel, Perez and Maldonado taking turns at the top.
But now Räikkönen leads the way with a decent 1:52.268 lap. He has been consistent this season and will be hungry for victory this weekend.
Vettel is currently tenth on the timesheet, with Rosberg now leading having set a 1:53.416 time.
World Champion Vettel says of this event, "It’s important to manage the time difference, so I try to sleep until the afternoon so my body thinks it’s still in Europe. The circuit has 23 corners so it’s extremely important for the driver to find a good rhythm without touching the barriers. This circuit is hard on the brakes and has a lot of kerbs."
Grip levels are typically low around the streets, much like Monte Carlo, at a venue which places huge demands on the brakes and physically on the drivers due to the layout and the humidity.
Kobayashi is still fastest. This really is a spectacular setting for racing and this was of course the first floodlit circuit in F1.
There are a few patches still visible but it's 90% dry.
Schumacher sets his first lap time of the session and moves into third position.
Kobayashi, Schumacher, Webber, Nico Rosberg and Bruno Senna are all out on track putting some work in now, almost everyone on soft tyres as the track has virtually dried out all the way around.
By the way Räikkönen holds the circuit record time here, a 1:45.599 lap set in 2008.
The Japanese driver is the first to go under the 2 minute mark this weekend.
But now Sauber's Kamui Kobayashi has set the pace...
Championship leader Alonso moves into top spot.
Lotus driver Romain Grosjean sets a time, but now a few drivers are starting to register and Nico Hülkenberg goes to the top of the timesheet with a 2:02.852 lap.
Half an hour into this session and the drivers are making various tweaks and observations, Hamilton has gone out on a soft tyre. Perez has just brushed a curb but it's relatively calm thus far.
Toro Rosso's Jean-Éric Vergne moves ahead of Glock with a 2:09.854 time.
That test did not last long as Vettel goes back to his garage after two laps to analyse the data gathered.
Hispania's Pedro de la Rosa joins Vettel on track, with the German undertaking a speed test on intermediates.
Still only Glock on the clock, as the natural light fades and the floodlights become more prominent.
Sauber's Sergio Perez has made a tyre change and gone for intermediates, let's see if he sets a time shortly.
Glock is the first driver to set a time, a rather laid back 2:24.476s.
Michael Schumacher is taking it easy for now, relaxing in his garage and chewing on what appears to be an energy bar.
Ok, enough weather talk for now. Marussia's Timo Glock and Charles Pic are out on track with Mark Webber getting a feel for the tarmac, all three on inters.
The track is damp after rain earlier with some drivers on wet tyres and some on inters and more rain possible before the end of this session.
The weather conditions would be best described as clammy, it must be uncormfortable work for the drivers. The sun will set at around 19.00 local time and then we'll see those famous floodlights doing their job.
Several drivers, including Hamilton, are undertaking early laps on wet tyres as the humidity is typically high here.
Hamilton has emerged for his first lap now. He is wearing a special edition Singapore helmet this weekend.
Not a huge amount happening so far, so we'll take the opportunity to remind you that the remaining races this year take place in Singapore, Japan, South Korea, India, Abu Dhabi, USA and Brazil.
All the drivers have made at least one lap now, other than Hamilton who remains in his garage. No times set as yet though.
It is early evening in Singapore and the floodlights are on, but the sun has not set yet. It is hot and humid with the air temperature hovering just under 29 degrees celsius.
So far eleven drivers have made their way out, including Alonson and Räikkönen, as they find their way around the Marina Bay circuit.
The clock reaches 18.00 local time and the drivers start to make their way out of the pits.
We're just five minutes from the start of the session now. By the way, we'll also be covering FP2 later at 14.30 UK time - that's 21.30 in Singapore.
Alonso currently leads the title race in his Ferrari by 37 points ahead of McLaren driver Hamilton, with Lotus’ Kimi Räikkönen and Red Bull’s Sebastian Vettel just behind the Briton in third and fourth respectively.
After his win at Monza in the last round Lewis Hamilton is looking to keep the pressure on championship leader Fernando Alonso this weekend, with seven races remaining this season.
Welcome to our LIVE coverage of the first free practice session for the Singapore Grand Prix. The local time is 17.45 and we're almost ready for action.