Hope you enjoyed the race once the action got started for real - I certainly did, but it's time for some hot chocolate and a hot water bottle. Which means I'm all done on Twitter for the day, but follow me anyway.
Follow the Canadian Grand Prix live with Eurosport. The race starts at 18:00 on 12 June 2011. Find race results, standings, stats, scores and track info. Keep up with the top F1 drivers and teams including Lewis Hamilton (Mercedes), Valteri Bottas (Mercedes) and Max Verstappen (Red Bull Racing).
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Full results are on the left - Button has gone second in the drivers' championship, but remains 60 points behind Vettel.
Jenson Button produced a remarkable victory at a marathon, chaotic Canadian Grand Prix despite going through the pitlane six times.
It is his first race win since China in April last year. Possibly the best end to a race for many years.
Button on the radio: "A hell of a race!!!! A hell of a race!!!!"
Vettel crosses for second spot ahead of Webber with Schumacher gutted to finish off the podium in fourth. Petrov is fifth - and the DRS allows Massa to take sixth from Kobayashi by a nose. Alguersuari, Barrichello and Buemi complete the points positions.
And Button does indeed win in Canada ! What an amazing drive from the Briton!
Button will win the Canadian GP barring a calamity! Vettel lost his concentration!
VETTEL LOSES THE RED BULL AND BUTTON IS THROUGH!!!!!!!
The final lap as Button sets the fastest lap of the race! What a duel.
Di Resta has put the Force India into the barriers at turn 9. No overtaking at that corner. The gap from P1 to P2 is 0.94s.
Button told: "We can win this race, Jenson." Wouldn't that be a story? We should complete the full 70 laps.
Webber through to take third from Schumacher with three minutes and three laps to go!
Button 1.6s behind Vettel after picking up 1.5s on that last lap! Four minutes remaining - can we get the laps in?
And Button is three seconds behind Vettel and able to catch him in the closing stages! What an end to this race! Webber right up on veteran Schumi.
And Button also passes Schumacher for second!!!!!! DRS skills again from the 2009 world champion! What a drive!
Webber again cuts that corner and Button on the racing line streaks past for third!
Webber passes and leaves Schumi for dead but locks up and cuts the corner - has to give the place back. He manages it without also allowing Button through!
Schumacher three seconds behind Vettel, who should win the race from here.
Massa past Barrichello for ninth. Kobayashi in sixth holding off Rosberg.
Webber almost touching Schumacher with Button right up behind the pair of them. Will the Briton get a chance to snatch second despite being in the wars - passing through the pitlane six times in all and at one stage standing 20th.
Vettel compacts the field then bolts at the front.
The safety car to come in at the end of this lap. Things looking good for Red Bull.
A marshal falls over in the middle of the track and seems transfixed before leaping out of the way as an F1 car approaches, braking heavily. What's going on there? They haven't caught up the safety car yet.
Button right up behind Schumacher and Webber. He was flying before the incident, lapping two seconds quicker than Vettel even.
The Lotus is winched away as the marshals get rid of the carbon pieces.
The safety car is out with all the debris from the Renault's front wing at turn 3. Will that cause an issue with the time limits?
And Heidfeld catches Kobayashi, snaps his front wing then climbs on top of it to slide into the barriers and all the way off the track and safely down an exit road. He could not brake down.
Massa has been in to change his front wing. Webber attacking Schumacher.
The top 10: 1.Vettel 2.Schumi 3.Webber 4.Kobayashi 5.Heidfeld 6.Button 7.Petrov 8.Barrichello 9.Rosberg 10.Alguersuari. Sutil, Alonso, Alonso and Hamilton the drivers who have retired.
Vettel into the pits for super-soft dry tyres.
Massa has a damaged nosecone! He caught some water on the slicks, flew sideways as he lapped a HRT and caught the wall - but continued on.
Schumi is in the pits, as is Massa. The Mercedes remains ahead of the Ferrari as they come back out. They are fifth and sixth and on slicks, as is Webber. Vettel will surely come in soon.
If something were to happen to Vettel, Schumacher could be a race winner in his forties! As I said at the start, he is the 'Regenmeister'.
Brilliant from Schumacher! As Massa passed Kobayashi and held him off, the German superstar passed both up the inside for second spot!
We could have a good battle for second between Kobayashi, Massa and Schumi. The Brazilian has been told to activate his DRS a little later, once into the zone. Di Resta to serve a drivethrough.
Schumi has been off at turn 8 but resumed okay. Loses a second.
Rosberg/Sutil also to be investigated by race stewards... crikey. They're going to be busy. Schumacher three seconds behind Massa after setting a fastest lap.
Button up in 12th and right up behind Maldonado. He still wants points.
Schumacher 10 seconds off the leader while running fourth. Vettel six seconds ahead of Kobayashi.
The Heidfeld/Di Resta moment is also being looked at. Webber attacking Heidfeld now.
Schumacher, a man on a mission, overtakes Heidfeld for fourth.
Vettel's lead approaching five seconds after a fastest lap of 1:29.520. DRS is now enabled.
The Alonso/Button incident will be investigated after the race. Di Resta has managed to pit but is right down the field now.
Di Resta collides with Heidfeld at the final chicane and they both comes over the grass. The Force India's front wing is damaged and he has to get out of the way to let several cars come past. Di Resta's fault.
Schumacher, who has passed Webber after he got out of shape, has a go at Di Resta for fifth at the hairpin, but the Brit holds him off. Button past Liuzzi for 20th.
Things going very well for Vettel today but again his lead is cut to nothing.
The safety car comes in and Vettel is away. Button was trying to catch up to the others after that limp around to the pits and just managed it.
The order: 1.Vettel 2.Kobayashi 3.Massa 4.Heidfeld 5.Di Resta 6.Webber 7.Schumacher 8.Petrov 9.Rosberg 10.Sutil 11.Barrichello 12.Maldonado 13.Alguersuari 14.Buemi 15.D'Ambrosio 16.Glock 17.De la Rosa 18.Trulli 19.Karthikeyan 20.Liuzzi 21.Button
Alonso out of the race. The safety car is out.
Button coasting round on the tyre to the pits. He manages it. Vettel has been in for a super-smooth inters pitstop.
BUTTON HAS A PUNCTURE! He looked to pass Alonso up the inside and the Spaniard would not budge - the Briton caught him and spun him out.
ALONSO HAS CRASHED OUT AT THE TURN 3/4 CHICANE! The car doesn't look damaged.
Both Ferraris in for tyres. Chaos in the pitlane. Alonso has lost places.
Button is among them. The skies are clear and they should not need wets again. Button has a wobble as he rejoins. A Force India cuts across the grass but is okay. D'Ambrosio given a drivethrough as the safety car was not finished when he came in for the 'incorrect' inters.
A long line of cars to come in for intermediate rubber. D'Ambrosio, who was 23rd and last, pitted for them a couple of laps ago. Shocker from Virgin.
Massa past Kobayashi for P2!
Vettel slows the field down then goes for it when overtaking is allowed.
Safety car to come in on this lap. F1 supremo Bernie Ecclestone moved to axe the Bahrain GP from the 2011 calendar on Friday after the Gulf kingdom accepted the controversial race could not go ahead.
The racing line seems clear of standing water while all cars are on wets. Surely we can start soon... not on this lap.
The drivers weaving to get some heat into the tyres.
The safety car not coming in yet. Surely it will do so soon and we can have some racing.
Kovalainen retires. Gutted after all that waiting around.
The limit for the race time will be around 22:05 UK time. It could be a close-run thing, unless conditions improve markedly. There is 89 per cent humidity - blimey.
Kovalainen's Lotus is touring way behind the field. He might have to retire. "I don't have hardly any drive." Safety car stays out.
Massa asked how the visibility is: "Okay."
Visibility is the issue, not standing water. Still the Mercedes sportscar stays out.
No sign of the safety car coming in just yet.
The front order behind the safety car: 1.Vettel 2.Kobayashi 3.Massa 4.Heidfeld 5.Petrov 6.Di Resta
So much spray being sent up by the cars, which will clear a lot of the standing water on the track.
We get back underway under safety car conditions. Fingers crossed for an uninterrupted race.
Two minutes to the restart. Rain is falling again. Some excellent discussion on Lewis Hamilton and the wet weather situation today to be found below.
The race to restart behind the safety car at 15:50 local time (20:50 in the UK). Race control: "All cars must be fitted with full wets when the race starts." Go figure.
Fittipaldi is among the stewards. He told me in 2008: "When I joined McLaren, they were always a very organised team. They have all the ingredients: the human power and technology. Potentially Lewis can win multiple championships, as long as he's on the right team. If he can drive like he does now, how will he drive in the fourth and fifth years of his career?" He hasn't won another one yet, Emerson... what a lovely bloke he is, like most of the old F1 guys.
Another light shower coming in - they hope it will pass innocuously.
Whitmarsh says no one should take away Hamilton's passion for motor racing. Jordan asking the tough questions - could Hamilton take a year out? Could he change teams? The answer is no - "I've known him since he was 11 and he lives for motor racing... it's up to us to make sure we are on top form for him. He loves this team and I can;t see him leaving."
Whitmarsh: "This is how we run our race team - Lewis and Jenson want to race each other and that's how it is."
McLaren team principal Martin Whitmarsh expects some racing soon. He says that his drivers are relaxed about their incident and indicates that neither was at fault.
George Lucas talks to the BBC after a chat with Eddie Jordan. "Movies about sports don't work - people prefer to see the real thing," the Star Wars director says. Has he never seen Slap Shot?
All sorts of vehicles out sucking up the water, big hoovers and the like. Some car engines starting up on the grid.
The rain has stopped!!!!!
Karthikeyan told by Hispania that the rain will stop in 10 minutes (20:00 UK time). They never seem to get it right in F1 though so don't hold your breath!
She has a feel of the MP4-26. Perhaps she's a spy for one of the rival teams... I'd like to hear her analysis of the rear wing.
Pop star Rihanna is in the Hamilton garage noseying about. At least he won't be distracted from anything important.
Rain continues to fall with large amounts of standing water on the circuit.
Webber: "It's not a track where the water has too many options to go places... they've got nothing to lose by waiting for a few hours (to get the race done)."
Rain to stop in 10-15 minutes. The time is 19:45 in the UK.
Vettel has gone into the garage now but D'Ambrosio remains in his car.
In the old days they would have continued on of course, no matter how farcical the situation. As Alain Prost once said: "It's like when people talk about driving F1 cars in the rain. I have absolutely no problem with it." He wasn't all that good in it though, by all accounts.
Marshals brushing the water off with brooms. Don't think it will make much difference, but 10/10 for effort.
And still it rains. The fans seem in good spirits despite the array of umbrellas. Let's hope they will see some serious racing soon.
As more than two laps have been completed, we can have half points. Seventy-five per cent has to be completed for full points. The race clock has been stopped so, with the two-hour limit in mind, there is an hour and 14 minutes left to use for the racing.
Hamilton's car has been returned to the garage and his team wipe it down ahead of a detailed inspection either here or back in Woking.
Hamilton says he was ordered to park the McLaren because of suspension damage. However he reckons he only had a puncture. The wheel looked pretty ruined, hanging off.
All of the drivers are well away from the cars in the dry as the teams continue to cover up their entries to keep the water out of the cockpits. Rosberg still inside his car, unlike Mercedes team-mate Schumi.
Vettel's team radio highlights that the rain is now expected to intensify. No racing expected for the next 20 minutes at least - time is 19:08 in the UK.
Rain expected to ease off in the next 20 minutes. The time is 19:00 in the UK.
Nick B: "Safety car for no reason, how long before F1 goes down the route of Nascar and has safety cars if someone gets too far ahead !!!!!"
Hamilton says he was halfway alongside Button at the point of contact. Not so. Naturally disappointed, he says he will stay and support the team rather than leave the area.
The rain is expected to continue for half an hour or so. The time is 18:52 in the UK.
The track is flooded in some areas. It is the right decision to stop the race in my opinion. Follow me on Twitter.
De la Rosa is racing because Mexican rookie Sergio Perez of Sauber felt unwell in Friday's first practice.
piers: "what a disaster for McClaren. you have to give kudos for trying in difficult conditions maybe jenson should have been more awaare but with the spray who knows ?"
Nice guy: "They will not say anything again cos Button is at fault.."
alan.cann: "Hamilton being investigated again for some dodgy driving, what about Vettel? ignores a corner (63') cuts the chicane complety! surely THAT is cheating! Immediate Disqualification required & a ban from several races as punishment."
The race is stopped. The cars can be worked on but they must not drive into the pitlane.
Button says on the run up to the hairpin they cannot see anything. McLaren promise to pass the info on to race control, who of course are listening anyway.
Our F1 expert thought Vettel was under threat from McLaren here - but he has coped with the challenge admirably.
No sign of the race restarting yet. Vettel says it is undriveable out there for him, especially at turns nine to 13, never mind those with spray coming up from cars in front.
Top order as Massa comes in and rejoins: 1.Vettel 2.Kobayashi 3.Massa 4.Heidfeld 5.Petrov 6.Di Resta 7.Webber 8.Alonso 9.Di la Resta 10.Button. Schumi has been in for wets now. Vettel and Massa the only two of the top six to pit so far.
Vettel second behind Massa, who is yet to pit. An intriguing tactical battle out there in Canada. Throwing it down in the pitlane - Schumi is still on his inters.
Vettel pits, as do Alguersuari, Heikki Kovalainen, Barrichello, Maldonado and Trulli. And Webber.
Safety car out! The rain is so hard that it is not safe! Alonso back in for full wets, likewise Button. Well played Vettel and Massa.
Still Vettel stays out, lapping two seconds slower than the fastest lap. Schumacher is one of several drivers to come in for inters - but the rain is here and heavy!
Button leaves Di Resta for dust. Alonso comes out between the Renaults in sixth.
Paul Di Resta in the Force India fending off fellow Briton Button. Alonso in for inters, likewise Rosberg. Button-Hamilton incident to be investigated after the race.
Button four seconds quicker than Vettel on the intermediate tyres on this quickly drying track! Will the German come in?
Barrichello comes in. Webber all over the rear of Heidfeld, a battle for seventh. No sign of that rain yet.
Webber up to eighth after passing Vitaly Petrov. Button past Pastor Maldonado for 11th and flying!
Alonso 3.5s behind world champion and standings leader Vettel.
Button 14th after passing Buemi and those inters are working well for him at present. Vettel's boys are keeping an eye on his progress. /// Mark: "Hamilton is impatient. Trying too hard."
Button was up to 10th after the restart, but comes in to serve his penalty. The Briton emerges in 16th.
Button has a drivethrough penalty for the speed limit offence.
The safety car in and away they go again.
Button and Hamilton under investigation for breaking the safety car speed limit. The third for retired Lewis today.
Webber told there is a problem with the paddle on the downshift. They will change the steering wheel when he comes in.
Rain is coming - and Jenson is on the wrong tyres!
So with the safety car out, the order: 1.Vettel 2.Alonso 3.Massa 4.Rosberg 5.Schumi 6.Kobayashi 7.Heidfeld 8.Petrov 9.Webber 10.Di Resta 11.Maldonado 12.Button 13.Sutil 14.Barrichello 15.Buemi 16.Trulli 17.De la Rosa 18.Kovalainen 19.Glock 20.Alguersuari 21.Karthikeyan 22.D'Ambrosio 23.Liuzzi
Hamilton now under investigation for another incident. He already has a complex about receiving these...
Button in for some inters. He is told on the radio that there is no damage to his MP4-26. Hamilton was under investigation for that contact with Webber, no longer necessary.
Button on the team radio: "What is he doing!!!!!" Hamilton in the wars again!
Hamilton was quicker out of the corner and Button held his line - his rear made contact with the front wing of Hamilton's car and Lewis also touched the pit wall, ruining a rear wheel. Hamilton retires at turn five.
Hamilton makes contact with team-mate Button on the straight!
Vettel cuts the chicane completely! His lead up to six seconds over Alonso.
Hamilton could be in trouble as he turned into Button despite having plenty of room.
1.Vettel 2.Alonso 3.Massa 4.Rosberg 5.Schumacher 6.Button
Vettel leads from Alonso, Felipe Massa, Rosberg and Button. Webber 14th with Hamilton sixth, behind Schumacher who passed the Briton - Button also came through as Lewis ran wide.
Webber touches Hamilton and both cars run wide!
Off they go and Alonso has a look at Vettel... he almost finds a way past but is fended off!
Safety car to come in at the end of this lap. All the drivers on edge, ready to set off.
There may be rain in 15 minutes. Hamilton says visibility is okay. The eternal optimist.
Visibility so poor out there - no chance of the race starting for real just yet.
Rain is expected in 15 minutes. DRS is disabled.
No formation lap in a safety car start. The cars set off behind the Merc.
Jaime Alguersuari to start from the pitlane in the Toro Rosso.
Sebastian Vettel secured yet another pole position this season after finishing on top in qualifying.
That means every car will have full wets on - no choice.
The race will start behind the safety car. A real shame, but the health of the drivers comes first.
Michael Schumacher is a master in the wet and so watch him from eighth, Red Ears. Leave your comments below, people - nothing nasty!!
The drivers have backed the decision by the FIA to experiment with two DRS zones - even if it proves to be a step too far.
Colin Farrell on the grid looking typically moody. He wouldn't look happy if the sun was blazing down.
Jenson Button, who like McLaren team-mate Lewis Hamilton goes well in wet condtions, tells the Beeb there is a lot of standing water on the track.
Webber fears that he may be left without KERS again after losing the power-boost for qualifying in Montreal.
Nico Rosberg's car is late arriving on the grid. Mercedes principal Ross Brawn says intermediate tyres will not be possible at the start, which will likely lead to a flurry of early pitstops to ditch the wets when they become usable.
For the first time in his Formula One career Hamilton will not start from pole at the Canadian GP, promoting the dejected McLaren driver to all but wave the white flag before Sunday's race.
A wet grid is very busy but the rain has stopped. Mark Webber tells the BBC that visibility will be very poor out there.
Jarno Trulli is anticipating a eventful race if the rain that has drenched the Circuit Gilles Villeneuve holds.
McLaren insists they are not holding out hope that the change to the blown-diffuser regulations will be the key factor that helps them overhaul title rivals Red Bull Racing.
Lewis Hamilton needs to rein back his aggression against his rivals on-track if he is to achieve his full potential, claims former world champion Emerson Fittipaldi.
Leave a comment below to say what you expect to happen. And visit our F1 page for stats and stories from Canada.
In the meantime, have a read of how Casey Stoner won a soaking wet British Grand Prix at Silverstone to take the MotoGP World Championship lead as Jorge Lorenzo crashed out.
Welcome to coverage of the Canadian Grand Prix from Montreal. The action begins at 18:00 UK time to join us in the half hour prior to that for the build-up to the race.