Vettel fastest in second practice
Hamilton struggling in cool, windy conditions, Button out
Many cars lost control under braking
Get involved & vote: when was F1's best era? #bbcf1
Ferrari boss nearly run over by Massa in FP1
Hello. Ready for some more of the F1 cars?
Me too. Thirty minutes and they will be with us again for FP2.
We'll bring you all the action and analysis as Nico Rosberg bids to top the timesheets once again.
All that, plus more gems from the picture vaults as we ponder what was F1's greatest era.
Image source, Getty ImagesJulie Andrews, earlier today
Image source, APRight, we're out of here for an hour or so.
That was a pretty lively session, with locked brakes aplenty and high-profile failures for both Fernando Alonso and Sebastian Vettel.
Most crucial of all, Nico Rosberg appeared to have the legs on Lewis Hamilton, who was more than a little curt with his team over the radio at the end of that session.
Please join us at 12:30 BST for the build up to FP2, which begins a 13:00.
Image source, F1Williams on Twitter:, external After 26 laps for Bottas he then has a pitstop practice to focus on, as the boys swarm his car...
Image source, Williams
Image source, Getty ImagesMax Verstappen put up the most laps in that session, with 38 for Toro Rosso.
Sergio Perez of Force India completed 37, ahead of Mercedes' Nico Rosberg and the second Force India of Nico Hulkenberg, both with 36.
At the other end of the scale, Sebastian Vettel managed just four laps in the Ferrari before his gearbox issue struck.
Lotus on Twitter:, external FP1 done for Jolyon Palmer.
P14 for the Brit, stepping in for Grosjean for the fourth time in FP1 this season.
Image source, Lotus1 Rosberg 1:10.401, 2 Hamilton +0.3s, 3 Raikkonen +0.6s, 4 Bottas +1.1s, 5 Nasr +1.2s, 6 Kvyat +1.2s, 7 Ricciardo +1.3s, 8 Verstappen +1.4s, 9 Massa +1.4, 10 Perez +1.5
Lewis Hamilton has just responded pretty irritably to being asked to make some changes in the cockpit.
"How many changes do you guys want me to do, can I just focus on driving?" comes the reply from the championship leader.
George Taylor: Maurizio should re-watch the Green Cross Code on crossing an active road. Or pit lane!
Image source, Getty ImagesDavid Prowse there, in the second-best acting gig he ever got.
Max Verstappen: "It's undriveable, seriously. So much understeer at Turn Eight."
Jennie Gow
BBC Radio 5 live pit-lane reporter
Vettel in the garage...
Image source, Jennie GowVettel stopped out on track earlier with what has been diagnosed with a gearbox problem. We won't be seeing him on track until FP2.
Image source, Getty ImagesJohnny Servoz Gavin at the wheel of a 1967 Matra
Cynical Human: 1967 was the peak of car design for mechanical grip and no aero. Great cars, great drivers and great circuits.
Ash: The 80s-90s were the best eras. Senna-Prost battles, Schumacher and Ferrari, and Murray Walker with the facts.
Michael Brown: Schumacher/Hakkinen. Everything was all out, very little conservation.
Image source, Getty ImagesA quick check on Jolyon Palmer's progress for you.
The Lotus test driver - in for Romain Grosjean for this session - is running in 10th place, one tenth and two place ahead of regular driver Pastor Maldonado.
Andrew Benson
Chief F1 writer
"The Canadian Grand Prix has reignited the debate about the state of F1, with many fans objecting to the requirement on the drivers in Montreal to save fuel during the race. We've addressed this issue in a major feature this week already. Many fans are comparing F1 unfavourably with the world endurance championship, there being a growing belief that the drivers in sportscars are flat out for longer than those in F1.
"When it comes to tyre usage, that is certainly true, but there is a lot of misinformation going around about this when it comes to fuel-saving - as Force India's Nico Hulkenberg, who won Le Mans on his debut last weekend, explains.
Image source, Getty Images"'To do lift and coast in Formula 1 is quite easy - you just left off and coast down. The difficulty is to do it efficiently and to lose as little lap time as possible. When you do it your braking point varies, so it's quite difficult for us to judge, you know, where the actual braking point has moved. To get close to that target, I think that's the art, that's what makes it difficult. In WEC we also have quite a bit of lift and coast. They have different fuel regulations, they're even tighter than here in F1, so fuel management is quite crucial there.'"
No no no, Jenson Button.
If someone takes you by surprise with a camera, the standard procedure (as I have perfected over the years) is to half-close your eyes, slacken your jaw to give your mouth a lovely 'lolling' look, and generally try and look as ugly as possible.
This is far too flattering.
Image source, Getty ImagesJust under 25 minutes to go. Not a lot of change in the order.
Nico Rosberg leads the way on a 1:10.401, with Mercedes team-mate Lewis Hamilton 0.308secs back.
Then it's Ferrari's Kimi Raikkonen, Max Verstappen of Toro Rosso and Sergio Perez of Force India. Carlo Sainz rounds out the current top six in the second Toro Rosso.
Peter Guenter: Surely the Schumi/Hill era. Those battles were legendary! The entire '90s basically.
Liam Geraghty: 1998-2001 Hakkinen v Schumacher. Some titanic tussles and wonderful overtaking moves.
Lukas Redl: For me it would be 2000-2008 when F1 was on the edge, cars were difficult to drive, drivers were making mistakes.
Image source, Getty ImagesHonda on Twitter:, external After some great work by the McLaren Honda engineers Alonso has made it back out on track for FP1.
Image source, Honda F1
Image source, F1Jenson Button has joined Lewis Hamilton in locking a tyre into turn one.
The 2009 champion tries to carry on but the tyre is flat-spotted and excessive vibration forces the McLaren man into the pits.