15:40 - So, it's gold for Omega Pharma-Quick Step, silver for BMC and bronze for Orica-GreenEdge.
15:40 - Top five at the finish: 1. Omega Pharma-Quick Step 1:03:17.17, 2. BMC +3.23, 3. Orica-GreenEdge +47.06, 4. Liquigas +1:04.73, 5. Rabobank +1:08.13.
15:39 - Team Sky cross the line 1:32.21 down - and it's only good enough for ninth place.
15:37 - Sky are the last team left on the road. They complete the Cauberg with four riders but the British team have been struggling all day today and they may not even make the top ten.
15:35 - That's a big effort from Orica-GreenEdge, who look to have secured the bronze medal. The Australian team crosses the line 47.01 down on Omega Pharma-Quick Step, but with Sky faltering behind, it looks good for a podium finish.
15:32 - GreenEdge are next up. They too are down to four men in their bid to make the podium. The Cauberg is proving pivotal today, that's for sure.
15:30 - Gilbert, in the Belgian national champions helmet, drives the pace before peeling back. They are all taking big turns and it's going to be close... so close... and it's silver. Omega Pharma hold on by three seconds!
15:28 - BMC lose two riders quickly on the Cauberg, and then Taylor Phinney struggles and the leading four will have to regroup. Van Garderen was too powerful on the climb, and Phinney needed to be paced back by Gilbert and Ballan. That could be the difference between gold and silver.
15:26 - Wow, that's brilliant by Omega Pharma-Quick Step: they finish as a full six and take more than a minute off the previous leaders Liquigas. We have a new target time of 1:03:17.17. Can BMC match it?
15:24 - Both Omega Pharma and BMC still have a full six-man quota of riders. The former are on the Cauberg and the latter have that climb coming right up. It's between these two teams for the win today, surely. Just nine seconds separated them at the third check.
15:23 - Only sixth fastest for Garmin-Sharp at the finish, 30.34 down on Liquigas, and with still four teams to come.
15:22 - All the teams are through the third check. Top five: 1. Omega Pharma-QuickStep 45:08.58, 2. BMC 45:17.37, 3. Orica-GreenEdge 45:37.21, 4. Rabobank 45:53.30, 5. Liquigas 45:56.26.
15:19 - Omega Pharma-Quick Step - still riding as a six - show just how devastating they are today in passing RadioShack's Andreas Kloden ahead of the Cauberg. As for the rest of RadioShack - they have just crossed the line in fifth place, 16:49 down on Liquigas.
15:16 - Finally regrouped, Rabobank give it their all on the final straight, but it's not enough and they cross the line 3.40 seconds down on leaders Liquigas, who are all smiles (and laughs) in the winners enclosure.
15:14 - Disaster for Rabobank on the Cauberg: they have two men up the road and two struggling further back - plus another two already out of the equation. Sanchez and Gesink looked to be struggling there. Stef Clement and Lars Boom were just too strong on that climb. That could be their medal chance out of the window.
15:10 - Yes, Omega Pharma-Quick Step are roaring towards gold here: they snatch a massive 45 seconds off previous leaders Rabobank at the third check.
15:08 - It's the provisional second best time for Movistar at the finish: 13.84 seconds behind leaders Liquigas.
15:07 - Omega Pharma-QuickStep are powering up the Bergseweg climb with a full quota of riders. They are going vbery strong and will be the favourites trending now on betting sites.
15:05 - Saxo Bank-Tinkoff Bank can only set the fourth best time at the finish, 43.62 behind Liquigas. Their six-man squad was: Manuele Boaro, Michael Morkov, Luke Roberts, Nicki Sorensen, David Tanner, Matteo Tosatto.
15:04 - Top five at the second check at 21.6km: 1. Omega Pharma-Quick Step 25:49.36, 2. BMC +8.24, 3. Rabobank +8.46, 4. Orica GreenEdge +12:30, 5, Garmin-Sharp +23.05.
15:02 - Team Sky's decline continues: they are a man and almost 30 seconds down on Omega Pharma-Quick Step at the second check.
15:01 - It's only third fastest for Vacansoleil at the finish, which means they will have next to no chance on staying for a podium place. The Dutch team were 43.48 slower than leaders Liquigas.
15:00 - Rabobank shave three seconds off Liquigas at the third check to take the provisional lead - but they are already down a man, plus have the Cauberg climb still coming up before the finish.
14:58 - Yes, both Garmin and RadioShack are struggling - only the fifth and eighth best times at the second check respectively.
14:56 - It's the second best time for Astana at the finish, but the Kazakh team are 40.24 seconds down on Liquigas. Their six-man team was Assan Bazayev, Alexsandr Dyachenkom Andriy Grivko, Dmitry Gruzdev, Tanel Kangert and Dmitry Muravyev.
14:53 - Liquigas have just thrashed the previous best time, set by Rusvelo. The Italian team completed the course in a time of 1:04:21.90, which was well over a minute quicker than the Russian Pro Conti team.
14:52 - All the teams are now through the first intermediate check. The top five is: 1. Omega Pharma-QuickStep 14:05.16, 2. Rabobank +0, 3. Orica GreenEdge +1.47, 4. BMC +1.81, 5. Liquigas +2.80. Garmin were sixth and Sky eighth.
14:50 - Omega Pharma-QuickStep are having a stormer: they tied Rabobank at the first check but have just passed the second check more than eight seconds quicker. The new target time there is 25:49.36, with just three more teams to come through: GreenEdge, BMC and Sky.
14:48 - Liquigas are approaching the finish and they still have their six riders together. That said, they have quickly shed two riders on the Cauberg, and they seem to be splintering somewhat. Nibali, on the front, will have to slow down a touch.
14:45 - Garmin seemed to be struggling with that Vuelta-heavy squad. They set only the sixth-best time at the first check. But they did ride well on the second section, where they are currently second. But they have already shed a man.
14:42 - Vacansoleil pass through the third check 14 seconds down on Liquigas. The Dutch team had a very fast second section of the race, but now seem to be tiring.
14:40 - Rabobank have lost their first man: Wilco Kelderman falls by the wayside on a long, flat straight.
14:39 - Liquigas are leading at the third check, but both Rabobank and Vacansoleil (who were above them at the second) are yet to pass through.
14:38 - Rabobank led at the first check and are now leading at the second check too: they have bettered Vacansoleil's previous target time by 15.12 seconds.
14:36 - The last team is on the road: Team Sky are the 40th team to leave the start. None of the big guns - Wiggins, Froome, Rogers, Porte - are amongst the six, but it's still a strong team: Edvald Boasson Hagen, Alex Dowsett, Juan Antonio Flecha, Sergio Henao, Ian Stannard and Geraint Thomas.
14:31 - Orica-GreenEdge have targeted a top three finish. They have just started and have a squad of Sam Bewley, Luke Durbridge, Sebastian Langeveld, Cameron Meyer, Jens Mouris and Svein Tuft. Just one more team to start now...
14:30 - Fastest time for Ag2r-La Mondiale at the finish: the French team, with four of their six, cross the line in a time of 1:05:43.31 to pip Euskaltel by 4.72 seconds.
14:28 - Alessandro Ballan, Philippe Gilbert, Taylor Phinney, Marco Pinotti, Manuel Quinziato and Tejay van Garderen are the BMC solid six. They have just left.
14:25 - Rabobank are the new leaders at the first check, setting a time of 14:05.16. That's 2.80 quicker than previous leaders Liquigas.
14:22 - Another one of the big favourites has just started: Omega Pharma-Quick Step, with a team of Tom Boonen, Sylvain Chavanel, Tony Martin, Niki Terpstra, Kristof Vandewalle and Peter Velits. That's a strong six - although we can expect Boonen to perhaps be dropped by the finish, what with the road race in mind.
14:20 - Liquigas still lead at the first check, but Movistar are now second - 7.08 seconds behind the Italian team. Liquigas have just passed through the second check too: second best to Vacansoleil-DCM, who lead by 3.46 seconds. The Vacansoleil team is Thomas de Gendt, Martijn Keizer, Gustav Larsson, Marco Marcato, Tomasz Marczynzki and Lieuwe Westra.
14:18 - Garmin-Sharp have a sound pedigree in TTTs. They have just started, with a six of: Jack Bauer, Thomas Dekker, Martijn Maaskant, Ramunas Navardauskas, Andrew Talansky and Johan van Summeren. Four of those riders were in the Vuelta - will they be suffering from fatigue a little?
14:15 - RadioShack-Nissan have started. They have a blend of youth and experience: Tony Gallopin, Andreas Kloeden, Yaroslav Popovych, Jesse Sergent, Jens Voigt and Hamiar Zubeldia.
14:11 - Big roars from the crowd for Rabobank, who have just started. They will be amongst the favourites today. They were second in the Vuelta TTT, but with a very different team. Their six are Stef Clement, Lars Boom, Rick Flens, Robert Gesink, Wilco Kelderman, Luis Leon Sanchez.
14:10 - Liquigas-Cannondale have set the best time at the first check point. 14:07.96 is more than ten seconds quicker than Astana's effort. The Liquigas team is Maciej Bodnar, Tiziano Dall'Antonio, Kristijan Koren, Vincenzo Nibali, Maciej Petersky and Peter Sagan.
14:08 - Remember, the time is taken when the fourth riders crosses the line - so teams can only afford to shed two bodies during the race.
14:07 - Katusha roll down the ramp. They have Maxim Belkov, Vladimir Gusev, Aliaksandr Kuchynski, Denis Menchov, Gatis Smukulis and Eduard Vorganov.
14:05 - Movistar are the latest team to start. The Spanish outfit won the TTT in the Vuelta last month and so come into this with good form. Their six men are: Andrey Amador, Jonathan Castroviejo, Jose Gutierrez, Vladimir Karpets, Vasil Kiryienka and Ruben Plaza. Only a couple of those riders were in the winning Vuelta squad, including Castroviejo, who crossed the line in Pamplona first to take the first red jersey of the Vuelta.
14:00 - A lot of the mainstream teams have started now, with the likes of Ag2r-La Mondiale, Liquigas, FDJ, Lotto Belisol, Lampre, Astana, Vacansoleil-DCM and Saxo Bank all on the road.
13:55 - The US-based Team Optum Presented by Kelly Benefit Strategies have just crossed the finish line to set the second best time - just 3.87 seconds down on leaders Itera-Katusha.
13:50 - First team down the ramp, MTN Qhubeka set the best time of the first five teams before they were taken over by Itera-Katusha, the Continental squad of the Katusha team. The Russian outfit completed the course in a time of 1:06.26 - 28.69 seconds faster than the South African team.
13:30 - Earlier today, Team Specialized - Lululemon kept to the script in the women's TTT, beating Orica by 24.19 seconds to take the world championships gold.
13:20 - We have almost a dozen Pro Continental and Continantal teams on the road at the moment, including well known French duo Saur Sojasun and Cofidis. Rabobank's Continental team is on the course too. The fist Pro Tour team has just left - Euskaltel-Euskadi. We'll bring some time updates soon.
13:10 - The climbs are: Lange Raarberg (4.5% for 1.3km after 19km), Bergseweg (3.3% for 2.7km after 36km), Cauberg (5.8% for 1.2km after 51km).
13:00 - The Netherlands may have a reputation for being flat, but the region of Limburg is an exception: there are three categorised climbs and numerous small rises in the undulating course.
12:40 - Amongst the 40 teams today we have World Tour, Pro Continental and Continental teams. Realistically, however, only a handful of squads will have serious aspirations for the win. We're talking the usual suspects: Team Sky, Garmin-Sharp, Orica-GreenEdge, BMC, Omega Pharma-QuickStep and Rabobank.
12:35 - MTN Qhubeka - south African's first ever Pro Continental cycling team - have started their ride. The second to start just now was Spanish second tier outfit Caja Rural, who we saw a lot of during the recent Vuelta a Espana. Amongst their six riders is Antonio Piedra, who won a mountain stage in the Spanish tour a couple of weeks ago.
12:30 - This is the first time there was been a Worlds TTT since 1994 - and back then, it was for international teams of four riders. This revamped TTT is for trade teams with squads of six riders.
12:25 - It's a sunny day in Limburg - all round, it's ideal conditions: sun, 22 degrees and no wind.
12:25 - The first team to roll down the ramp today - at 12:30 UK time - will be new South African pro continental outfit MTN Qhubeka, who recently announced the signing of Gerald Ciolek for 2013. Teams will leave at four minute intervals, with Team Sky the last to start at 14:34 UK time.
12:20 - Welcome to live coverage of the World Championships TTT. Last run in 1994, this new version includes 40 teams of six riders over an undulating 53.2km course in the Dutch region of Limberg.