Summary
Hamilton takes record 69th pole
Stroll second and Ocon third after penalties for Red Bull drivers applied
Qualifying started at 13:00 BST before Grosjean crashed five mins in
Heavy rain meant qualifying did not restart until 15:40 BST
Listen to 5 live commentary online
Postpublished at 13:41 British Summer Time 2 September 2017
get involved Get Involved - F1 poemspublished at 13:40 British Summer Time 2 September 2017
#bbcf1
James Scott has penned this little ditty...
Red flags are red
Rain drops are blue
There's not been a crash yet
Oops spoke to soon!
Image source, Rex FeaturesPostpublished at 13:40 British Summer Time 2 September 2017
Cheers for the updates, Martin.
Postpublished at 13:38 British Summer Time 2 September 2017
Allan McNish
BBC Radio 5 live Formula 1 analystThe safety car has been back out there. Things are looking a lot better now than they were before. The rain is still falling but not quite as intensely as before.
Postpublished at 13:37 British Summer Time 2 September 2017
Haas driver Romain Grosjean speaking to Sky Sports: "We should have not gone out at all. I am pretty straightforward about that.
"The impact wasn't strong - I hit the barriers at an angle but spinning on a straight shouldn't happen in Formula 1".
get involved Get Involved - Rain delaypublished at 13:35 British Summer Time 2 September 2017
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Bishop Yinkus: Visibility is seriously difficult. Don't think I could drive in such conditions
Wonky Way: This is madness..do we need a fatal crash before cancelling.
Adam Reynolds: Should/could they send all the cars out for 10 minutes non-qualifying time under VSC pace to help dry the track?
Image source, Rex FeaturesAnother 15 minute delaypublished at 13:31 British Summer Time 2 September 2017
Our next update will be at 14:45 local time (13:45 BST).
Particle accelerator turn-on = rain in Monzapublished at 13:29 British Summer Time 2 September 2017
Here's an obscure bit of scientific-F1 tittle-tattle.
The last wet qualifying session in Monza was in 2008, when Sebastian Vettel took a shock pole for Toro Rosso en route to an even more shocking win a day later.
That race was held in the week the Large Hadron Collider was turned on deep underground in Geneva. Quite a few people were concerned what the LHC would do to the - well - world, once it was up and running, and the extreme weather and black-as-night skies in Monza that week led one or two people in the paddock to wonder if their worst fears were about to be realised.
As it turned out, the world was not rent asunder by the LHC, so that's nice.
Anyway, yesterday a not dissimilar machine was switched on for the first time deep underground in Germany- the XFEL. This is a powerful X-ray machine housed in a 3.4km-long tunnel complex some 40m beneath Hamburg and the nearby town of Schenefeld.
AND NOW IT'S RAINING IN MONZA AGAIN!
COINCIDENCE?
Image source, XFELImage caption, XFEL: Causing rain in Monza since 2017. Possibly.
When you schedule a tweet but the timing couldn't be worse...published at 13:24 British Summer Time 2 September 2017
Image source, .get involved Get Involved - Qualifying delayedpublished at 13:18 British Summer Time 2 September 2017
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Nicola Fairhurst: All this money in #f1, external and there is no machine to clear water off the track?
Keith Murray: Actually scary watching Quali in conditions like these. Drivers don't get enough credit
Andy Douglas: What a shame, that was getting interesting. Was Grosjean actually crying on the radio?
Image source, Formula 1 TwitterPostpublished at 13:17 British Summer Time 2 September 2017
We're getting some replays of the Grosjean crash. It was really a heavy whack with the barrier on the left side of the track as he blasted down towards the first chicane. The Haas speared back across the track and came to rest of the right side of the circuit.
A big moment.
Re-start delayed - next update at 13:30 BSTpublished at 13:16 British Summer Time 2 September 2017
Erm....
Does anyone know any limericks?
That won't buff outpublished at 13:15 British Summer Time 2 September 2017
Safety car on trackpublished at 13:14 British Summer Time 2 September 2017
As in FP3, the safety car has gone out to assess conditions.
Pirelli trying to pre-empt criticism?published at 13:14 British Summer Time 2 September 2017
Postpublished at 13:12 British Summer Time 2 September 2017
'I do not want to see drivers become passengers'published at 13:11 British Summer Time 2 September 2017
Allan McNish
BBC Radio 5 live Formula 1 analystThe cars are designed to run to a limitation and unfortunately for Grosjean's point of view, the limitation was about five minutes before he went out on track.
I want to see the cars out on track but I do not want to see drivers become passengers with absolutely no control of their cars.
Postpublished at 13:09 British Summer Time 2 September 2017
Allan McNish
BBC Radio 5 live Formula 1 analystIt is a really tricky situation because as a driver, yes you want to go out and qualify, but no-one wants to hit the wall at that speed.
Postpublished at 13:07 British Summer Time 2 September 2017
Team radiopublished at 13:06 British Summer Time 2 September 2017
"I told you it was too dangerous," says Grosjean.
He sounds OK but pretty angry...