0km - Victory for Cancellara!! The 29-year-old from Wohlen in the canton of Aargau in Switzerland crosses the line in 6:25:32. Boonen crosses around 1:15 behind in second with Gilbert beating Leukemans in the head-to-head sprint for third place. A big group contests a bunch sprint for fifth place and it is won by Tyler Farrar.
5km - Cancellara's chain snapped on the Koppenberg last year but no misfortune this year and after winning the E3 at Harelbeke ahead of Boonen, he is now powering towards the 58th victory of his career. He will become the first Swiss winner since Heiri Suter in 1923.
10km - Cancellara is in his element in a time trial situation, he is a three time world time trial champion, the current Olympic champion and the winner of three prologues at the Tour de France. The 980m Bosberg is the 15th and final climb and the Swiss champion goes over the top with a lead of 57 seconds over Boonen with Gilbert and Leukemans a further 30 seconds back.
15km - Massive crowds on the Muur-Kapelmuur as Cancellara powers away from Boonen on the final steep part of the climb! He has opened up a gap of around 250m and will now time trial to the line. Gilbert and Leukemans have left Millar.
20km - The gap for the two leaders is 52 seconds with just the Muur-Kapelmuur and the Bosberg to climb. Millar-Gilbert-Leukemans have opened out a 30 second advantage over a nine-man chase group in what seems now like the quest for the final place on the podium. Cancellara is looking to become just the 11th rider to win all three majors spring Classics. He won Milan-San Remo in 2008 and Paris-Roubaix in 2006. Andrei Tchmil was the last man to complete the triple in 2000.
25km - The gap is up to 55 seconds as they go over climb number 13, the Tenbosse and it looks to be a Boonen-Cancellara head-to-head for victory. Home favourite Boonen is looking to equal the record of Achiel Buysse (Bel - 1940, 1941, 1943), Fiorenzo Magni (Ita - 1949, 1950, 1951), Eric Leman (Bel - 1970, 1972, 1973) and Johan Museeuw (Bel - 1993, 1995, 1998) by becoming a triple winner of this race.
30km - Millar goes off on his own in pursuit of the star duo. Gilbert leads Leukemans over the 940m asphalt ascent of the Berendries, which climbed 65m at a maximum 14 per cent gradient, and that trio are 34 seconds behind Cancellara and Boonen.
35km - The gap increases to 24 seconds over climb number 11, the Leberg which was 950m of asphalt which climbed 39m at a maximum gradient of 15 per cent. The 12-man hase group includes Bjorn Leukemans (Vacansoleil), Steve Chainel (Bbox), Sebastian Langeveld (Rabobank), Iglinksy, Millar, Hincapie, Flecha and Devolder.
40km - Cancellara hits the front on the Molenberg and Boonen follows. That causes a big split in the bunch and the two pre-race favourites lead by 15 seconds. Hayman is leading the chase group for his Sky team-mate Flecha with Eisel and Hincapie following.
45km - Armstrong and Ballan active on the front in the run-in to the Molenberg. Hayman goes off the front which suggests the pace has dropped off a touch. Breschel, Hushovd and Boom are trying to use the cars to regain contact with the lead group.
50km - Cancellara has a full bike change at the end of the cobbles and O'Grady is with him at the perfect time. The Swiss is soon on the back of the main bunch but Saxo Bank couldn't get Breschel's bike off the roof when the Dane needed a change and it will take a big effort for him to regain contact with the lead group which is being stretched out by Team Sky.
55km - The long breakaway is swept up on the Eikenberg. Geraint Thomas, Matthew Hayman and Ian Stannard of Team Sky at the front for a long stint. 10km before climb number 10, the Molenberg.
60km - The 530m cobbled ascent of the Taaienberg climbed 45m with a maximum gradient of 18 per cent and there were no major moves. Lance Armstrong is still in the lead group as they head for the Eikenberg, just 10 seconds behind the remaining three escapees.
65km - Garcia, Ignatiev and van Leijen still lead the race by 30 seconds from a Team Sky led peloton of around 40 riders as they go over the Steenbeekdries. Climb number eight, the cobbled Taaienberg, approachs.
70km - Breschel and Boonen power up the incredibly steep, unevenly cobbled Koppenberg which climbs 64m with a gradient of 22 per cent. Many riders are running up the climb as one mechanical problem leads a chain reaction.
75km - Matti Breschel sets the pace on the 360m Paterberg. Boonen, Cancellara and Flecha follow. Hoste, Thor Hushovd and Boom are also right up there. Many of the favourites showing their face. Next up is the Koppenberg of which Mark Cavendish says: "The lead-up to it narrows and then there is the corner beforehand. Even being in the top ten there, if something happens you are going to be walking up it."
80km - Saxo Bank's Stuart O'Grady sets the pace on the narrow Oude Kwaremont where the race can be lost if not won. The peloton is really strung out with four men still hanging on in front. No time for rest with climb number five, the cobbled Paterberg, imminent.
85km - Peter van Petegem on the Oude Kwaremont which is 2.2km long and climbs 93m at a maximum of 11 per cent: "The run-up to this climb is a race within a race. It's nervous, and elbows and shoulders are the order of the day to secure the best spot at the front. You really need to be a nasty b to defend and keep your position. The Oude Kwaremont is not a climb where you just stretch your legs. It's very important to be in the first two rows in order to get in the right position."
90km - They go over climbs two and three respectively of the 15 that need to be tackled, the Klusberg and the Knokteberg. The gap is just two minutes. Everyone trying to get position before the Oude Kwaremont.
95km - Lots of street furniture in Belgium and Aliaksandr Kuschynski (Liquigas-Doimo) collides with a sign, a painful blow.
100km - Another crash in the peloton and Gorka Izagirre (Euskaltel) looks to have fractured his collarbone. Sergei Ivanov (Katyusha) and Lars Boom (Rabobank) are amongst those who are delayed but they quickly rejoin the main bunch as we prepare for the business end of the race. The gap is four minutes to the eight leaders as we prepare for 14 climbs over the next 85km.
110km - The gap is down to six minutes as another pile-up in the peloton causes a delay. Britain's Dan Lloyd is one of those to be disrupted. Belgium has 66 victories in his race, Britain just one - Tom Simpson in 1961. LIVE audio from David Harmon and Sean Kelly
120km - Adam Blythe (Omega Pharma-Lotto) has just punctured, bad timing as crosswinds cause the first splits in the peloton. He is one of nine Brits in the field. Mark Cavendish (Columbia-HTC), Ian Stannard (Team Sky), Geraint Thomas (Team Sky), Tom Faiers (Footon-Servetto), David Millar (Garmin-Transitions), Roger Hammond (Cervelo), Jeremy Hunt (Cervelo) and Daniel Lloyd (Cervelo) are the others.
130km - A crash in the peloton sees some of the Garmin riders hit the deck but they are all up unscathed. The leaders have gone over Den Ast but the Oude-Kwaremont, after 179km, is when the serious climbs begin. From there the cobbled hills come in quick sucession with the iconic Koppenberg, Eikenberg, Molenberg, the Muur and finally the Bosberg in the space of 70km.
140km - If you are looking for an outsider to cause a shock, how about Daniel Oss (Liquigas), Simon Spilak (Lampre), Stijn Vandenbergh (Katusha) or Maxim Iglinskiy (Astana). The lead has ducked under 10 minutes for the leading eight as we head towards the first climb which comes after 131km at Den Ast.
150km - Other contenders are Italian Alessandro Ballan, winner in 2007, who now rides for BMC alongside George Hincapie who finished third in Flanders in 2006 and has four other top-10 finishes in the race. Gilbert's team-mate Leif Hoste finished as runner-up to Ballan in 2007, his third podium finish at Flanders. Three days of De Panne winner David Millar (Garmin-Transitions) and Gent-Welvegem champ Bernhard Eisel (HTC-Columbia) carry the form card.
160km - Juan Antonio Flecha (Team Sky), Cancellara's Saxo Bank team-mate Matti Breschel and Philippe Gilbert are given three stars by the French paper. Omega Pharma-Lotto's Gilbert won the bunch sprint to finish third at Flanders last year and was third in Gent-Wevelgem last week.
170km - Today's L'Equipe gives fives stars to Tom Boonen and Fabian Cancellara as their top picks for victory with four stars to Boonen's team-mate Stijn Devolder who is looking for a third consecutive victory. Quick Step have won four of the last five editions: twice with Boonen in 2005 and 2006, and twice with Devolder. Gabriel Rasch (Cervelo) has abandoned.
180km - It is currently dry but dark clouds are looming. There is a 70% chance of rain, strong wind gusts are expected and temperatures in single figures. Typical Flanders weather!
190km - From the start in Brugge, the riders headed north west towards the coast before turning inland at Ostend and heading into deepest Flanders to tackle 15 of the region's toughest climbs before the finish in Ninove.
200km - Olivier Bonnaire (Francaise des Jeux), David Boucher (Landbouwkrediet) and Michail Ignatiev (Katusha) have made it an eight-man lead group and their advantage is 13 minutes on the main pack.
210km - One of the contenders for the race, Martijn Maaskant (Garmin), has hit the ground after colliding with his own team car but is back up and riding.
220km - The lead is now five minutes over a peloton that includes Lance Armstrong. He is racing for the first time since '05 when he cracked on the Tenbosse. "My guess is that (Armstrong is riding) just to get the feel for racing on these roads, and in these types of conditions, since we have to do it in the first week of the Tour de France," George Hincapie told VeloNews. Lance tweeted this morning: "Up and at 'em early for the Tour of Flanders today. Peeking out the window I see wet streets and rain."
230km - Why only 198 riders you ask. AG2R and Lampre started with only seven riders as Gatis Smukulis and Lorenzo Bernucci failed to sign on this morning. Potential winners Filippo Pozzato, Edvald Boasson Hagen and Heinrich Haussler are also absent through illness or injury.
240km - Michele Merlo (Footon-Servetto), Nicolas Rousseau (AG2R), Joost van Leijen (Vacansoleil), Floris Goesinnen (Skil-Shimano) and Vicente Garcia Acosta (Caisse d'Epargne) attacked almost immediately and have opened up a two minute lead.
250km - 25 teams in action: Ag2r-La Mondiale, Astana, BBox Bouygues Telecom, BMC Racing Team, Caisse d'Epargne, Cervélo TestTeam, Euskaltel-Euskadi, Footon-Servetto, Francaise des Jeux, Garmin-Transitions, HTC-Columbia, Katusha, Lampre-Farnese Vini, Landbouwkrediet-Colnago, Liquigas-Doimo, Milram, Omega Pharma-Lotto, Quick Step, Rabobank, RadioShack, Saxo Bank, Skil-Shimano, Team Sky, Topsport Vlaanderen-Mercator and Vacansoleil.
260km - And you can watch the race from Noon on British Eurosport (Sky 410 / Virgin 521) and the Eurosport Player
09:05 - 198 riders have set off in wet conditions for the 94th Tour of Flanders. It is one of the sport's monuments and you can follow all the coverage right here.