Get involved #bbcf1published at 10:30 British Summer Time 25 May 2017
Josephat Okora:@McLarenF1, external Seems to be having a great day so far. They never give up. I am really happy to see them progress.
Summary
Vettel fastest, Stroll crashes, Palmer breaks down
Hamilton only eighth as Mercedes choose not to push
Get involved #bbcf1 #IfIwereJenson
Get involved #bbcf1published at 10:30 British Summer Time 25 May 2017
Postpublished at 10:27 British Summer Time 25 May 2017
The Toro Rossos haven't even looked at the ultra-softs this morning, the only team not to do some running on that compound. Daniil Kvyat and Carlos Sainz, sixth and ninth quickest respectively, have done their times on super-softs.
Image source, Getty ImagesPostpublished at 10:25 British Summer Time 25 May 2017
Lewis Hamilton's work is done for the day. He is being wheeled back into the garage with five minutes to go.
The Briton is set to finish the session quickest. He's going for his third victory in Monaco, having won in 2008 and last year.
Image source, Getty ImagesPostpublished at 10:22 British Summer Time 25 May 2017
Allan McNish
BBC Radio 5 live Formula 1 analystWe are talking the lens of the camera being pretty much able to touch the tyres!
Postpublished at 10:22 British Summer Time 25 May 2017
There's one mighty brave - or foolish - photographer right up against the barrier at the Swimming Pool exit, allowing for a brilliant slo-mo shot of him being so close to Carlos Sainz's Toro Rosso that he can almost touch it.
Postpublished at 10:19 British Summer Time 25 May 2017
Personal bests in the first and final sectors help Max Verstappen to a 1:13.781 and he's now up into third, 0.356s off Lewis Hamilton's time.
Image source, Getty ImagesPostpublished at 10:18 British Summer Time 25 May 2017
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Get involved #bbcf1published at 10:18 British Summer Time 25 May 2017
Kayleigh: Worked a night shift. Still not been to sleep cause it's #monacobaby, external and my @McLarenF1, external tops are due for delivery today.
Lloyd Davies: JB! JB! JB! JB! #bbcf1, external the only thing that could make me love this man anymore is if he heroically pushes the car over line and passes out!
Postpublished at 10:17 British Summer Time 25 May 2017
Max Verstappen is creeping up the timing board. He's just done a 1:13.816 to go fourth quickest, four tenths of a second off Lewis Hamilton.
Postpublished at 10:14 British Summer Time 25 May 2017
Button's first time on the ultra-softs is a 1:15.541 - the 15th quickest time. Not bad.
Button presses wrong buttonpublished at 10:13 British Summer Time 25 May 2017
Jenson Button has... accidentally pressed the wrong button!
"Why did I go neutral for a moment," he asks.
McLaren say it was because of "an accidental button press".
Still getting used to these cars.
Postpublished at 10:11 British Summer Time 25 May 2017
Formula 1 teams are paying their respects to the victims of the attack at the Manchester Arena earlier this week.
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Postpublished at 10:08 British Summer Time 25 May 2017
Right then, Jenson Button has ditched the softs and slapped on the ultra-softs. Time to see what he can REALLY do *rubs hands together*.
Get involved #bbcf1published at 10:06 British Summer Time 25 May 2017
Best driver never to win in Monaco
Toni Vasconcelos: Hi from Brazil! Jim Clark was the best, and never win in Monaco.
Stewart: Button just needs an engine failure now to complete the McLaren Honda 2017 F1 experience.
Image source, Getty ImagesPostpublished at 10:04 British Summer Time 25 May 2017
A crackly and expletive laden radio message from Daniel Ricciardo suggests he is not happy with balance of his Red Bull at the moment. He's currently fourth quickest. The top four are split by less than half a second.
Meanwhile, Max Verstappen's tan topping time is over. His car has been put back together and he is about to head back out.
Image source, Getty ImagesGet involved #bbcf1published at 10:03 British Summer Time 25 May 2017
Best driver never to win in Monaco
Who is the best driver to never win in Monaco? Let us know your thoughts via #bbcf1
Get involved #bbcf1published at 10:01 British Summer Time 25 May 2017
Stewart: Button 18th in #MonacoGP, external practice at thr minute. Looks like hes adapted perfectly to the McLaren and he's getting 100% from it!
Oh you!
Postpublished at 09:59 British Summer Time 25 May 2017
Max Verstappen is catching some rays. There's not much else for him to do because Red Bull are still working away on his car.
Meanwhile, Sebastian Vettel squeezes ahead of Valtteri Bottas into P2 after a 1:13.621. He's two tenths off Lewis Hamilton.
Image source, Getty ImagesPostpublished at 09:57 British Summer Time 25 May 2017
Image source, F1.comPostpublished at 09:56 British Summer Time 25 May 2017
Sebastian Vettel gets familiar with the barrier at the exact same spot Kimi Raikkonen did earlier this morning.
"Can you check, I brushed the wall slightly," confesses Vettel.