Summary
Vettel wins, Hamilton out after losing power
Ricciardo 2nd, Raikkonen 3rd, Rosberg 4th
Member of crowd walks on to circuit
Verstappen refuses to obey team orders
Button and Maldonado collide - bodywork just misses Sainz
Massa and Hulkenberg crash
Hulkenberg, Massa, Hamilton, Alonso, Button out
Postpublished at 14:34 British Summer Time 20 September 2015
Postpublished at 14:33
Max Verstappen is a born racer. He has got beyond Felipe Nasr and now he sweeps past Pastor Maldonado. He is ninth, with Carlos Sainz 10th. Both in the points and there's huge cheers from the Toro Rosso garage.
Postpublished at 14:32 British Summer Time 20 September 2015
Replays show that part of Jenson Button's front wing very nearly struck Carlos Sainz's helmet. A very dangerous moment.
Postpublished at 14:31 British Summer Time 20 September 2015
David Coulthard
BBC F1 co-commentator"One thing you can about Maldonado, he guarantees good TV time."
Postpublished at 14:31
"I should have known really," laments Jenson Button after that tangle with Pastor Maldonado.
Postpublished at 14:30 British Summer Time 20 September 2015
Yellow flagpublished at 14:29
With the field all bunched up, Jenson Button's McLaren collides into the back of Pastor Maldonado and loses his front wing. Straight into the pits and that's a real points opportunity lost. Button is right down to the back of the pack.
Postpublished at 14:26
Sebastian Vettel slams his foot down on the accelerator and already is building up an advantage once again over Daniel Ricciardo.
Safety car coming inpublished at 14:25
Twenty one laps to go and we've been racing for around one hour and 25 minutes.
The safety car is coming in at the end of this lap...
Get involved - #bbcf1published at 14:25 British Summer Time 20 September 2015
Will Collins: At the Singapore Grand Prix and someone has just walked along the track right in front of us during the race!
Ben Wear: That is a staggeringly calm and gentle stroll that gentleman is having.
Vasyl Mylko: Finally the famous Singapore poltergeist showed up visually.
Team radiopublished at 14:23
The safety car is still out and Sebastian Vettel is not happy with it.
"Tell the safety car to speed up," he says.
Image source, APTeam radiopublished at 14:22 British Summer Time 20 September 2015
Nico Rosberg: "Are we going to the end?"
Engineer: "You are going to end, Nico. Everyone is going to the end."
Postpublished at 14:22 British Summer Time 20 September 2015
Postpublished at 14:22
Stops for Nico Rosberg, Valtteri Bottas and Jenson Button. Are we on for a fight to the flag now?
Postpublished at 14:21 British Summer Time 20 September 2015
Postpublished at 14:19 British Summer Time 20 September 2015
"A man on the track!"published at 14:19 British Summer Time 20 September 2015
Team radio
Race leader Sebastian Vettel: "There is a man on the track! A man on the track!"
Postpublished at 14:19
The front three of Sebastian Vettel, Daniel Ricciardo and Kimi Raikkonen all pit, taking on softs.
Postpublished at 14:18
What on Earth!? Camera shots show someone, quite calmly strolling along the inside edge of the track as F1 cars whizz by. What is he thinking? He strolls to a gap in the fence and climbs off the circuit.
Utterly bizarre.
Safety carpublished at 14:17
There is a second safety car and there is someone on the circuit!