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
Red flagpublished at 13:05 British Summer Time 2 September 2017
Crash!published at 13:05 British Summer Time 2 September 2017
Grosjean crashes his Haas at the end of the pit straight. Aquaplaning.
Just moments earlier he had told his team: "Can't see where I am going - this is too dangerous."
That proves it, I guess.
Postpublished at 13:04 British Summer Time 2 September 2017
We have times on the board. The two Mercedes cars are up there.
Hamilton does a 1:40.1 to go fastest. Now Vettel sets a time, as does Grosjean.
Team radiopublished at 13:03 British Summer Time 2 September 2017
"Rain is intensifying in the pitlane" says Pete Bonnington to Hamilton. "No need to take risks".
Postpublished at 13:03 British Summer Time 2 September 2017
Hamilton has just slung his Mercedes through the Lesmos, spray flying.
Rather him than me.
Postpublished at 13:02 British Summer Time 2 September 2017
Bottas is aquaplaning down the pit straight in the Mercedes and then goes straight on at the first turn.
Treacherous.
Postpublished at 13:01 British Summer Time 2 September 2017
It's hammering down now.
This could get interesting.
Is the session in jeopardy?
Image source, Rex FeaturesPostpublished at 13:01 British Summer Time 2 September 2017
Go! Go! Go!published at 13:00 British Summer Time 2 September 2017
The first segment of the qualifying hour is under way.
And it's raining even harder...
Postpublished at 12:56 British Summer Time 2 September 2017
BBC Radio 5 liveThe 5 live team at Monza staying dry in the commentary box - but feel for Jennie Gow who has forgotten a waterproof coat for the second race weekend in a row.
The spectators hoped for some Italian sunshine but brollies and non-leaky footwear a must.
To be honest, you are better to stick with us from the comfort of your sofa...
Image source, Getty Images
Image source, Getty ImagesFive minutes to gopublished at 12:56 British Summer Time 2 September 2017
Rain is falling but this session will get under way on time.
We have spies everywhere #2published at 12:53 British Summer Time 2 September 2017
Postpublished at 12:51 British Summer Time 2 September 2017
A potted history of F1's pole position recordpublished at 12:49 British Summer Time 2 September 2017
Since the F1 world championship began, just five men have held the outright record for the number of pole positions.
Ignoring the sport's first ever pole sitter, Giuseppe Farina, the first driver to hold the outright record was five-time champion Juan Manuel Fangio, who was the first man to take two F1 poles and would eventually retire with a record of 29 poles from 53 entries.
Fangio traded the record with two-time champion Alberto Ascari (14 poles from 33 entries) through the 1953 season before taking outright ownership until Jim Clark usurped him by claiming his 30th career pole at the 1967 Canadian Grand Prix.
Clark's ultimate record of 33 poles from 73 entries stood for 21 years before Ayrton Senna beat it at the 1989 US Grand Prix.
Senna (162 entries) eventually marched the record out to a stunning 65 poles, a figure he would have doubtless added to but for his untimely death at Imola in 1994.
His record stood for another 12 years before Michael Schumacher's pole at the 2006 San Marino Grand Prix took him clear on 66.
Schumacher's career ended with 68 poles from 308 entries. Hamilton could beat that mark today at just his 201st grand prix weekend.
Image source, Getty ImagesImage caption, Juan Manuel Fangio took pole in 57% of the races he contested
Postpublished at 12:46 British Summer Time 2 September 2017
Happy birthday to Olivier... and Olivierpublished at 12:44 British Summer Time 2 September 2017
Three F1 birthdays to report today.
So it's many happy returns to Sauber's Marcus Ericsson, who turns 27, and not one but two Oliviers.
Monsieur Grouillard, who contested 41 races between 1989 and 1992, turns 59 today, while fellow Frenchman M. Panis is 51.
Panis contested 157 races between 1994 and 2004, famously winning the 1996 Monaco Grand Prix from 14th on the grid.
Image source, Getty ImagesMore engine penalties to reportpublished at 12:41 British Summer Time 2 September 2017
Andrew Benson
BBC Sport’s chief F1 writer in MonzaMore engine penalties. Verstappen and Palmer with 5th turbo; Hulkenberg and Palmer with 5th MGU-H. Lots of quick-ish cars at the back.
Alonso, Hulkenberg, Palmer, Ricciardo, Sainz and Verstappen all towards the back in whatever order. Guarantees action on Sunday
get involved Get Involved - your F1 poemspublished at 12:40 British Summer Time 2 September 2017
We've been asking for your F1 poems today after Lewis Hamilton's ode to Princess Diana.
We've had some belters but Clara Nicolson's magnificent effort deserves special mention.
Image source, .Postpublished at 12:36 British Summer Time 2 September 2017
This from Andrew Benson a little earlier...
We have spies everywherepublished at 12:35 British Summer Time 2 September 2017