Chris Vermuelen and Noriyuki Haga took the honours in Sunday's WSB round at Silverstone. We reported the action with live lap-by-lap updates. Here's how the day unfolded.
Superbikes race two:
Final lap: Vermulen wins and takes his debut victory for the Ten Kate team, having defended himself from Haga throughout the entire race.
Lap nineteen: Haga takes the lead once more only to have Vermuelen fight back. Coming into the complex Haga loses his footing on the right peg momentarily, but the pair are seperated by less than a bike length, with Laconi dropping back, seemingly happy to settle for third at a safe distance.
Lap seventeen: Vermuelen, Haga, Laconi, Haslam, Toseland, Martin, Ellison.
Lap fifteen: Haga moves into first, using the inside line at the end of Hangar straight, but Vermuelen somehow managed to outbrake him and retain the lead by going around the outside. Through the complex the pair are still inseperable, with Laconi two bike lengths behind in third. Haslam is still in fourth with James Toseland in fifth.
Lap thirteen: Retirements: Nannelli, Garcia, Chili, Velini.
Lap twelve: Haga again attacks at the end of the Hangar straight, but Vermuelen is able to hold on, as Laconi plays a waiting game in third. In his current position, Laconi will take the championship lead.
Lap eleven: Haga and Vermuelen swap places for a moment, but the Australian recovers the lead.
Lap ten: Haga moved up the inside of Laconi under braking at the end of the Hangar straight. Martin has closed up and passed James Ellison.
Lap eight: Positions are staying consistent, but the pressure is still on. Good news for British fans is that James Ellison has a small gap back to the chasing Steve Martin. Chris Walker is also doing well on the FP-1 in eighth position.
Lap seven: The retirement of Chili has moved James Ellison back up to sixth, and Toseland has recovered to maintain his fifth position.
Lap six: Vermuelen is repeating his first race performance but this time he has two Ducatis to keep behind him. Laconi is still second but Noryuki Haga is fighting back hard. There's a growing gap abck to Haslam in fourth and Toseland in fifth.
Lap five: Vermulen still has the lead from Haga, but Pier-Francesco Chili has moved up to fourth. James Toseland crosses the grass and loses places, and Chili is off, crashing out of the race. At the front Regis Laconi joins the battle riding around the outside of Haga under braking to move into second place.
Lap three: Chili demotes James Ellison one place, but Ellison is still having a fantastic ride on the Yamaha. Vermuelen meanwhile is stretching a small ggap away from Haga.
Lap two: Vermuelen goes through into the lead, using the power of the Honda CBR1000RR at the end of the Hangar straight. Then Laconi, Toseland, Haslam, Ellison, Chili, Walker.
Lap One: Haga leads Vermulen away from the grid with the two factory Ducatis close behind. Leon Haslam is up with the leading pack, and James Ellison is sixth.
The Foggy Petronas FP-1 of Troy Corser has been wheeled away from the grid as the rest of the field set off on the warm up lap for the second World Superbike race at Silverstone.
The grid has formed up and the warm-up lap will begin in the next few minutes.
Supersport: Final lap. Muggeridge leads the field into the final lap of the Silverstone circuit, ahead of Foret, Parkes and Lanzi. Foret makes his move halfway round the final lap allowing Muggeridge to retake the lead but as they enter the complex Foret sweeps around the outside of the Australian. Coming out of the final chicane Muggeridge takes the tight line, but the Frenchman's superior drive gives him the victory.
Lap 16: With just three laps to go, the titanic battle between Muggeridge, Parkes and Foret continues, but it's the Frenchman, Fabien Foret, who leads the race.But both Muggeridge and Parkes come past him in the complex and demote him to third, barely a bike loength ahead of Lorenzo Lanzi. Both Iannuzzo and Fujiwara have joined the list of retirements.
Lap seven: Muggeridge, Foret and Lanzi are the leaders. Brit Craig Jones is in 11th, locked in a battle with Max Neukirchner and Alessio Corradi. Christian Kellner, Arne Tode and Walter Tortoroglio have all pulled into the pits, while Giovanni Bussei has joined the retirements list with a crash.
Lap four: Muggeridge still leads from Lanzi and Foret, but a gap has opened up between fifth place Broc parkes and Jurgen VD Goorbergh in sixth. Brit Craig jones is up to 10th place, with Dean Ellisson in 22nd, but Luke Quigley has retired after a crash on his second lap.
Lap one: Karl Muggeridge has led from pole on the Honda CBR600RR, from Italian Lorenzo Lanzi and fellow Australian Kevin Curtain. Jurgen VD Goorbergh is fourth, Fabien Foret fifth, and Brits Luke Quigley and Craig Jones are in 11th and 13th.
Superbike race one: Race result: Haga wins at final corner. Haga managed to pick off Chris Vermuelen and deny the Australian his first ever victory by absolutely jamming his Renegade Ducati inside Vermuelen. Chili finished in a lonely third. Leon Haslam had a disapointing final lap trying to pass McCoy into the final chicane but running wide and letting the Australian escape. The Brit managed to hold on to finish fifth despite Steve Martin desperately spinning the rear tyre of his Ducati to try and get drive onto the pit straight.. Corser was seventh, Borciani eighth, Bontempi ninth and Clementi tenth.
Lap eighteen: Laconi falls at Woodcote chicance and desperately struggles to restart. Chili is now practically guaranteed third. This means both Fila Ducati riders have now dropped out of the running.
Lap sixteen: Sanchini crashes out of the race on the Kawasaki ZX-10. Vermuelen is still clinging onto the lead by his fingernails from the detrmined Haga.
Lap fifteen: It's still Vermuelen and Haga. Chili is back to thrid, benefitting from Regis Laconi losing traction from his rear tyre. Haslam fifth, Martin sixth, McCoy seventh, Corser eighth, ninth Sanchini, tenth Borciani.
Lap thirteen: Vermuelen is still fending off Haga, repeatedly being forced to brake later and later to beat the 'Samurai of Slide'. There's less than a bike length between the pair as they circulate Silverstone.
Lap twelve: Toseland crashes out of the race, but is able to walk back towards the pits.
Lap ten: The race is still between Chris Vermuelen and Noriyuki Haga. Regis Laconi has now moved ahead of Chili, and Steve Martin is mounting a late charge, moving in front of Haslam and Toseland.
Lap eight: Chris Walker has crashed out on the Foggy Petronas FP-1. Meanwhile at the front, Nori Haga is attacking young Australian Chris Vermuelen. Sadly British wildcard James Ellison is also a faller in the early stages.
Lap seven: A huge eight-man battle has erupted between from Toseland in fifth, down to Sanchini in twelfth. Leon Haslam has passed Troy Corser to move into sixth, and now faces a battle with Toseland for fifth. Chris Walker has made up a few places after qualifying in 13th, and is now running behind his team-mate, in eighth position.
Lap five: Vermulen resumes the lead from Haga, but niether has been able to break free from the other rider. There's then a gap to Chili, with Laconi in close attendance. Behind them it's Toseland, Corser, Walker, Haslam, Martin and Borciani in the top then.
Lap three: Pier-Fancesco Chili is flying up through the field, taking both the factory Ducatis. Regis Laconi is staying with the Italian in fourth, while james Toseland has dropped back a little in fifth.
Lap two: Haga takes the lead early in the lap, as the lead pair start to pull clear of the factory Ducatis in third and fourth. Pedercini crashes out of the race.
Lap one: Chris Vermuleni leads the first superbike race at Silverstone from Noriyuki Haga. James Toseland is up to third, ahead of team-mate Laconi, with Haslam fifth and Corser sixth.
The warm-up lap is almost completed, with the bikes starting to form up on the grid. Laconi takes his position on pole, alongside Chris Vermuelen, Nori Haga and James Toseland.
Final lap: It's almost too close to call as Vizziello mounts an attack coming into the chicane on the last lap. Despite the Vankeymeulen crash here just two laps ago, no quarter is given as the team-mates fight all the way to the line, with the result coming down to milliseconds. Eventually it was Alfonis that was triumphant, by 0.077 of a second from Vizziello, with fellow Italian Dionisi third.
Brit Ben Wilson claims a creditable eighth on his Suzuki GSX-R1000
Lap ten: Vankeymuelen took the lead briefly, but then fell out of the race pushing too hard at the chicane to try and stay in front of Alfonsi and Vizziello. The Italian pair are now clear to fight for the lead position, so the team-mates have to choose between battling for victory and taking a one-two.
Lap eight: The race didn't start well for home hopes with John Laverty falling at the first corner after making contact with another rider. Laverty had qualified fourth and was hoping for a podium. Better news for British fans is that wildcard Ben Wilson is in ninth place with just four laps remaining.
Current leader is Lorenzo Alfonsi, leading a trio of Yamaha R1s, with Dider Vankeymeulen and Gianluca Vizziello in close attendance
The racing has begun at Silverstone World Superbikes, with the Superstock class kicking things off. And the weather has come good for Sunday, matched only by the enthusiasm of the crowd.
Haga and Vermeulen took the honours at Silverstone on Sunday.
We updated the action lap by lap. Here's how the day went: