Lap-by-lap report from Sunday's Monaco Grand Prix.
FINISH - Webber is congratulated by fellow podium finishers Rosberg and Alonso, and then he climbs onto his RB8 to celebrate. That's that folks. It's been a good race. Maybe a bit processional, but at least the front-runners were close. Thank you for your company and do join us again in a fortnight for the Canadian GP.
FINISH - Perez, who started at the back of the field, finished P11. It's been a good day for Caterham as Kovalainen managed to finish P13.
FINISH - Webber thanks his crew as he cruises around the track in his RB8. It was pretty comfortable in the end.
FINISH - Mark Webber wins the Monaco Grand Prix!!! That's the sixth different winner in 2012. Rosberg is second and he is followed by Alonso, Vettel, Hamilton, Massa, Di Resta, Hulkenberg, Raikkonen and Senna.
Lap 78 - Webber starts the final lap and he is looking good for his second Monaco GP victory. The top six are separated by less than six seconds, but Webber holds firm.
Lap 77 - We have had nine retirements today. At the front, Webber looks like he has it under control.
Lap 76 - It seems to have settled down at the front again as Webber leads from Rosberg, Alonso, Vettel, Hamilton and Massa.
Lap 75 - Spare a thought for Vergne as he is going backwards on his intermediates. Kovalainen will also be going backwards as he is forced to pit after making contact with Button and Perez.
Lap 75 - Button is out of the race following that incident with Kovalainen.
Lap 75 - Back at the front, the top six are still bunched up and no one has blinked. Well, not yet anyway.
Lap 74 - Perez and Kovalainen are having a right old battle at the moment. The Sauber driver finally gets ahead of the Finn. However, he cuts a chicane and will be ordered to give that place back.
Lap 73 - The incident involving Perez and Kovalainen will be investigated after the race.
Lap 72 - Kovalainen, Button and Perez have a scramble at the back of the field. The McLaren driver hits the Caterham, who in turns makes contact with Perez.
Lap 72 - Vergne makes a late pit stop and they decide to put on intermediates. They are hoping to get him into the top 10. He is in P11 at teh moment.
Lap 72 - They are close, but no one wants to blink at the moment. It's a case of 'after you, sir'.
Lap 71 - It really is tight at the front as Webber is having to fend off Rosberg, who is under pressure from Alonso. Vettel and Hamilton are also in the mix.
Lap 71 - The lap 1 incident between Schumacher and Grosjean will be investigated after the race.
Lap 70 - The track is starting to get wet and the top six drivers are bunched up.
Lap 69 - Ricciardo pits, but he is not coming back out as he is also being wheeled back into the garage. That is the seventh retirement of the afternoon.
Lap 68 - Rosberg is now less than one second behind race leader Webber. Alonso is 1.3s off the German's pace. We could be in for a cracking finish.
Lap 67 - Schumacher's retirement means Raikkonen is into the top 10.
Lap 67 - Button has a look at Kovalainen, but the Caterham squeezes him out and holds on. Well for now at least.
Lap 66 - Schumacher finally pits and he is wheeled back into the garage. Another sad end to the race for the seven-time World Champion.
Lap 66 - Rosberg is closing the gap on Webber as the umbrellas start to go up. Yes folks, it has started to rain again. Not too hard at the moment.
Lap 65 - Schumacher allows Di Resta and Hulkenberg to pass him. His Mercedes lost an endplate.
Lap 64 - Webber and Rosberg are still lapping at roughly the same pace. Rosberg's Mercedes team-mate are starting to feel the pressure from Di Resta and Hulkenberg.
Lap 63 - Schumacher continues to struggle. Di Resta is 9.8s behind him and he will catch the German.
Lap 62 - Schumacher is starting to lose some pace and Vergne is closing the gap on him. The German has a problem and he puts up no fight as the Toro Rosso driver passes him. Such a shame for the seven-time World Champion.
Lap 61 - It is once again getting dark in Monte Carlo. Hamilton locks up a tyre as Massa starts to close the gap.
Lap 60 - Behind the top three we have Vettel, Hamilton, Massa, Schumacher, Vergne, Di Resta and Hulkenberg. Raikkonen, who was P6 early in the race, is down in P11.
Lap 59 - Not much action going on at the moment as Webber maintains a 1.9s lead over Rosberg, who in turn is 2.1s quicker than Alonso.
Lap 58 - Schumacher has managed to close up on Massa, but he is still more than 16s behind the Ferrari driver.
Lap 57 - Hamilton is told that Massa has been ordered to look after his tyres so that he can attack the McLaren at the end of the race.
Lap 56 - Alonso is dropping off Rosberg, who is second place. The Spaniard is now 3.2 seconds behind the Mercedes driver. Vettel, Hamilton and Massa are all not far behind Alonso.
Lap 55 - The yellow flags are out as a piece of debris came flying off the Marussia of Timo Glock.
Lap 54 - Button's struggles continues as he is still stuck behind the Caterham of Kovalainen in P14. It has been a poor weekend from the 2009 World Champion.
Lap 53 - Speaking of Massa, the Brazilian is on course for his best finish of the season. His previous best was a P9 and he is currently running in P6. Has he finally turned the corner?
Lap 52 - Vettel, Hamilton and Massa are separated by less than one second. Schumacher is over 20s behind the Ferrari of Massa.
Lap 51 - Webber is controlling the race, but the top five are separated by just 5.2s.
Lap 50 - Sergio Perez becomes the first driver to go under 1:18 and his 1:17.461 is the new fastest lap.
Lap 49 - Raikkonen is told that he needs to look after his tyres as he will go to the end on the current set. He's also told there's no further rain expected.
Lap 48 - Webber is now once again the race leader and he is 1.2s ahead of Rosberg while Alonso is 1.1s behind the Mercedes driver.
Lap 47 - Vettel finally pits and he comes out just ahead of Hamilton, who is P5. The McLaren driver tries to have a look, but there's no space there.
Lap 47 - Vettel did slow down in the previous lap so those tyres may be giving way. The Red Bull pit crew are out.
Lap 46 - Vettel is now nearly 17s ahead of Webber. He has done 46 laps on these soft tyres.
Lap 46 - Hamilton complains to the pit crew that they are 'dropping things from the pit will and something hit me on the head'. Nothing too serious.
Lap 45 - Button is still stuck behind Kovalainen in 13th place. He just cannot get past the Caterham.
Lap 44 - There has been a few spots of rain. Not too much at the moment, but it is getting very dark.
Lap 43 - Massa has somehow managed to get ahead of Schumacher and he is given the hurry up and told to put pressure on Hamilton in P5.
Lap 42 - Hamilton tells the pit wall that the tyres won't last very long at the current pace.
Lap 41 - Out in front, Vettel is still leading, but his team-mate Webber is now lapping a bit faster. Rosberg is 1.6 behind the Australian and they are followed by Alonso, Hamilton and Massa.
Lap 40 - Button pits and they switch to the soft tyres. The McLaren comes out behind the Caterham of Kovalainen. Great driving from the Finn.
Lap 39 - Sergio Perez is given a drive-through penalty for impeding Raikkonen at the pit lane entry.
Lap 39 - Button is told that it has started to rain.
Lap 39 - Vettel is in a class of his own on the softs at the moment as he increases his lead over his Red Bull team-mate to 16.2s. Is it the new floor?
Lap 38 - Raikkonen and Perez are under investigation by the stewards.
Lap 37 - Hulkenberg's 1:18.423 is the new fastest lap. He is running in P11.Lap 37 - Raikkonen gets himself in a spot of bother. He tries to get past Di Resta, but instead of getting ahead of the Scot, he is passed by Hulkenberg.
Lap 36 - Schumacher pits from P6 and he comes out behind Button who is in P9.
Lap 35 - Vettel is flying at the front and he's lapping in the 1:19s while those who just pitted are doing 1:21s at the minute.
Lap 34 - Vettel leads the pack, but he is still to stop. He's on a different strategy than the rest of the top five. He has managed to open a 12s lead over team-mate Webber. It is looking good for the defending World Champion, who started on the softs.
Lap 33 - Here's a look at the top 10 after the first round of stops. Vettel, Webber, Rosberg, Alonso, Hamilton, Schumacher, Massa, Di Resta, Ricciardo, Button.
Lap 32 - Massa pits from the lead and he comes out behind Lewis Hamilton as well as Schumacher. That means Schumi is the big winner as he is ahead of Massa and Raikkonen.
Lap 32 - Alonso pits and comes out in P5, but he is ahead of Hamilton. That extra lap has helped him to get in front of the McLaren driver.
Lap 31 - Raikkonen nearly caught a Force India mechanic after the back of his car went sliding to the left.
Lap 31 - Webber and Hamilton both pit at the same time. No changes though as Webber comes out in front of Rosberg. Raikkonen is also into the pits as are Hulkenberg and Senna. It's a case of as you were.
Lap 30 - Raikkonen is going very defensive as he struggles with his rear tyres. Further ahead, Alonso is now very close to Hamilton.
Lap 30 - Schumacher has another couple of looks behind Raikkonen, but there's no way through. There's a train behind the German driver.
Lap 29 - Mercedes are the first team to blink as they bring Rosberg into the pits. He comes out in P6 behind Vettel.
Lap 28 - Raikkonen is struggling on his tyres, but he is told that there will be rain in the next five laps so he needs to stay out.
Lap 28 - Schumacher once again gets very close to Raikkonen, but there is no chance of the overtake. He has a look, but there's just no space on the tight streets of Monte Carlo.
Lap 27 - Vergne puts his foot down after his pit stop and he sets a 1:19.013 to claim the new fastest lap.
Lap 27 - Rosberg has been told there is a chance of light rain in about four minutes. That means teams will be delaying their pit stops for the time being.
Lap 26 - Button has been told that those on options are starting to lose pace and are coming back to him.
Lap 25 - Vettel is under investigation for missing a chicane. Replays suggest he didn't gain too much of an advantage, but the stewards will decide if he gets a penalty.
Lap 24 - Schumacher is now right behind Raikkonen while Hulkenberg is not too far behind his German compatriot.
Lap 23 - Webber continues to look comfortable ahead of Rosberg. His lead is now 2.2s while the Mercedes driver has 2.5 edge over Hamilton.
Lap 22 - Button continues to struggle in P14. The McLaren driver is still 1.9s behind Kovalainen. If he's not careful than Perez will soon be catching up with him.
Lap 21 - Vettel and Raikkonen are not doing too much behind Massa at the moment. Vettel is now over three seconds behind the Ferrari driver while Raikkonen is a further three seconds off the German.
Lap 20 - Alonso has finally found some pace and he sets a fastest lap, a 1:19.190. He is now just 1.9s behind Hamilton.
Lap 20 - Perez overtakes Glock in P15 and the Marussia driver cuts the corner after running wide.
Lap 19 - Vergne pits and puts on the harder compound.
Lap 18 - Petrov is in the pits, but it looks like there is a problem. His Caterham is wheeled back into the garage. That could be that for the Russian.
Lap 18 - There is a train forming behind Alonso with his team-mate Massa leading the pack. Karthikeyan goes for a bit of a slide at the back of the field, but he keeps it on the track.
Lap 17 - Webber sets a 1:19.601 to increase his lead over Rosberg to two seconds. Rosberg, meanwhile, is 1.9s ahead of Hamilton.
Lap 16 - Jean-Eric Vergne has been told to give back a place after he cut a corner. He's not happy, but gives it back to Perez.
Lap 15 - The top three are now starting to move away from the Ferraris. To be honest, Massa is faster than Alonso at the moment. Alonso is three seconds behind Hamilton while Massa is 0.5s behind his team-mate. Wonder if Alonso will be to told 'Massa is faster than you'.
Lap 14 - Raikkonen has been told that rain is expected in about 15 laps' time.
Lap 13 - A look at the middle of the field and Button is not having any joy at the moment. He is in P14 and not putting too much pressure on Heikki Kovalainen in front of him.
Lap 12 - Michael Schumacher is still down in P8, but Raikkonen in front of him is not really getting away.
Lap 11 - Webber and Rosberg are lapping in the 1:20s while the rest of the top 10 are doing 1:21s.
Lap 10 - No further action will be taken after the drivers shortcut the first corner.
Lap 9 - Webber is now starting to open a gap over Rosberg as he puts his foot down to clock a 1:20.969.
Lap 9 - Kamui Kobayashi has made a second visit to the pits and he's not coming back out. That's the fourth retirement of the day.
Lap 8 - Several cars are under investigation for shortcutting the first corner. They have not specified which cars. Most of them might get away with it as that was where the Grosjean accident took place.
Lap 7 - Webber is looking very comfortable at the front while Rosberg is not being pressurised by Hamilton. The McLaren driver, though, does have Alonso right on his tail.
Lap 7 - A look at the rest of the field, Di Resta is up to P11 and he is followed by Ricciardo, Kovalainen, Button, Glock, Pic, Vergne, Perez, Karthikeyan, Kobayashi and Petrov.
Lap 6 - The field is still bunched up as Webber takes them around the circuit again. The Red Bull driver sets the mark with a 1:22.205
Lap 5 - De La Rosa, Maldonado and Grosjean are the three drivers who have not made it back onto the grid after the first lap chaos.
Lap 4 - We are up and running again as the Safety Car returns to the pits. Hamilton is immediately under pressure from Alonso and Massa, but he holds firm for now.
Lap 4 - Hamilton asks his McLaren team to check his car pressure as he went through a lot of debris on the start/finish straight.
Lap 3 - While Maldonado's car is being craned away, Webber takes the pack through again. Rosberg, Hamilton, Alonso, Massa, Vettel, Raikkonen, Schumacher, Hulkenberg and Senna make the rest of the top 10. Button has dropped to P14.
Lap 2 - Grosjean squeezed Schumacher right up to the barrier and they made contact, but the German was able to continue while the Renault driver crashed out.
Lap 2 - The Safety Car has been deployed - it's for the Maldonado incident. Meanwhile, De La Rosa heads into the pits with his rear wing hanging loose.
Lap 2 - Webber still leads, but Button has dropped further back. The Spanish GP winner Pastor Maldonado is out of the race already.
Lap 1 - Rosberg, Webber, Hamilton, Alonso, Massa, Vettel, Raikkonen, Schumacher, Hulkenberg and Senna. That's the top 10 for you.
Lap 1 - The 2012 Monaco GP is underway and it's a perfect start from Webber but it chaos at the back as Grosjean takes quite a few with him.
14:01 - Seb Vettel and Jenson Button are the only two drivers on the soft tyres in the top 12.
14:00 - Webber leads the pack around the streets of Monte Carlo for the formation lap.
13:58 - Weather update: Rain is now expected about 30 minutes into the race. That should spice things up further.
13:55 - Ready for action. The drivers are all in their cars, looking very focused, and ready for that formation lap to get underway.
13:50 - Back to the drivers, there are seven Monaco Grand Prix winners on the grid today as Schumacher (five), Alonso (two), Raikkonen, Hamilton, Button, Webber and Vettel have all stood on the top step of the podium here.
13:45 - There were some behind the scenes shenanigans this morning as some of the teams are reportedly unhappy with the floor of the Red Bull. The controversy surrounds a 'hole' in the RB8's floor and there have been suggestions that the rivals could be protesting. Let's see how this one unfolds after the race as the FIA will be having a closer look at floor.
13:38 - Here is a weather update for you. Initially there was talk of rain on race day, but the sun has been out all morning. There is a slight chance of rain later, but a maximum of 21C is expected today.
13:30 - Pit lane is open for the drivers to make their way to the grid.
13:26 - At the very back of the grid are Pastor Maldonado and Sergio Perez. Maldonado qualified P9 but was handed a ten-place penalty for an incident with Perez in final practice and then a five-place penalty for a gearbox change. Perez, who crashed in qualifying, had a five-place penalty for a gearbox change.
13:19 - Fernando Alonso and Schumacher are on the third row ahead of Felipe Massa and Kimi Raikkonen while Sebastian Vettel and Nico Hulkenberg complete the top ten.
13:14 - The second row belongs to Lewis Hamilton and Romain Grosjean. The Frenchman could be the dark horse this afternoon as he was quick in the practice sessions.
13:10 - Mark Webber is starting today's grand prix on pole after Schumacher's penalty dropped him to fifth while Nico Rosberg is joining the Australian on the front row of the grid.
13:00 - Welcome to coverage of the Monaco Grand Prix, round six of the 2012 World Championship. Will F1 see it's sixth different winner for the season around the streets of Monte Carlo? And can Michael Schumacher turn his qualy pace into his first Merc win? Those are the questions we're waiting to have answered.