The 2015 Avon Tyres British GT Championship arrives at Silverstone for the centrepiece three hour Silverstone 500 event on the Grand Prix circuit at the Northamptonshire track.
This live blog will be updated throughout the event.
Cars are forming up on the grid with drizzling rain falling.
Andrew Howard will start from pole on the Beachdean Aston Martin Vantage.
Gilles Vannelet, new to the British GT grid, will start his VonRyan Racing McLaren from second.
Oz Yusuf leads the GT4 class on the grid in the ISSY Racing Lotus Evora.
Teams have to complete a minimum of three driver change pitstops during the race. Those with extra time added to their stops after podium finishes at Rockingham serve the ‘penalty’ on the final stop.
Cars are away to start the formation laps.
Well, all except the #55 Optimum Motorsport Ginetta G55 GT4, which is being pushed from the grid.
Andrew Howard leads into Copse for the first time but he spin the #007 at Becketts!!!
Gilles Vannelet takes up the lead in his McLaren, Marco Attard second for Ecurie Ecosse.
It’s treacherous out there. All sorts of racing lines being taken through Village and the Loop as drivers experiment to find grip.
Vannelet leads lap one from Attard. Ahmad Al Harthy third in the #2 Oman Racing Team Aston
Yusuf holds the GT4 lead.
Andrew Howard crosses the line 18th.
Al Harthy takes second around the outside at Stowe.
Jamie Chadwick has had a spin at Copse, but she stopped the slide short of the gravel.
Lee Mowle goes wide at Becketts under pressure from Liam Griffin the #6 Aston.
Chadwick has come across the line, but she’s dropped from 4th to 10th in class after that spin.
Terry Langley takes the GT4 lead at Stowe, going around the outside of Yusuf’s Evora.
And now he’s back down to 4th in GT4, muscled wide by Will Moore and Richard Williams.
Back at the front Vannelet leads by 1.8 seconds from Al Harthy.
Some drivers are starting to dive for the wetter parts of the track down the straights.
Vannelet’s lead goes up to 2.3seconds with the fastest lap of the race on lap 4.
And in GT4 Will Moore moves the #61 Academy Motorsport Aston into the lead.
Yusuf has dropped to fifth in class.
GT4 leader Will Moore is under investigation for spinning Jamie Chadwick.
Vannelet’s lead up to 4.2 seconds, Attard another seven seconds back in third.
Lee Mowle goes grass tracking again, and loses a place to Jon Minshaw in the #63 Demon Tweeks BMW.
Graham Johnson pits the #50 GT4 Ginetta. He and Mike Robinson are the class points’ leaders.
Alistair MacKinnon takes sixth from Liam Griffin, the RAM Racing Merc making progress in the early laps.
Team Manager of Will Moore’s #61 GT4 Aston is being summoned to the stewards. Will they have to take a penalty for the early contact?
Vannelet is already into the tail of the GT4 class. Last year slower traffic played a role in the lead battle of this race.
Definite problems for the GT4 points leaders, who make a second stop in as many laps.
Ian Loggie suffers a big spin at Abbey. No damage thankfully and the Team Parker Racing Audi continues on.
However, he only moves as far the following corner before stopping the #24 entry.
10 laps and 25 minutes in Gilles Vannelet leads by 8 seconds over Ahmad Al Harthy. Jon Minshaw is now third in the red and green Barwell BMW.
Lap one spinner Andrew Howard has made it back into the top ten, but is more than 30 seconds off the lead.
Mark Farmer passes Ross Wylie for eighth, the 22GT Aston now ahead of VonRyan McLaren.
Chadwick moves back to third in GT4, passing the Richard Williams Toyta GT86 at the chicane at the end of the Vale.
Mark Farmer is the latest driver to straight line between Becketts and Chapel as Andrew Howard passes Ross Wylie for 9th.
Derek Johnston spins the #17 Aston at Stowe and Gary Eastwood collects the front end of the car. Damage to the front-left FF Corse Ferrari.
Safety Car is out. That’ll wipe out a 8 second lead for Vannelet and prompt rush hour in the pitlane!
Vannelet, Al Harthy, Minshaw, Attard and Griffin lead the field into the pits.
Lee Mowle and Alistair MacKinnon continue on track, taking first and second on track.
The FF Corse pitcrew look at thee damage to their car, but the Ferrari is wheeled back into the garage.
Now, after 36 minutes of three hours Mowle and MacKinnon pit, but Mark Farmer stays out, the 22GT Racing driver taking the lead.
David Ashburn should be up to second place in the Trackspeed Porsche.
Replays show that Derek Johnston spun the TF Sport Aston all on his own, and had just begun to try and rejoin the race when Gary Eastwood arrived on the scene.
Tim Eakin has picked up the GT4 lead in his Stratton Motorsport Lotus.
So, under Safety Car Mark Farmer leads David Ashburn with Adrian Quaife-Hobbs third having taken over the #12 McLaren from Gilles Vannelet.
FF Corse’s Ferrari is confirmed as a retirement. Radiator damage suffered in the collision with the #17 Aston the reason.
Ian Loggie is back in the pits in the Team Parker Racing Audi, but his body language alone tells the story. Out of the race.
The #55 Optimum Ginetta – 12 laps down on the overall leader – is the first car to swap onto slick tyres.
If this safety car stays out much longer you get the feeling they won’t be alone for too long.
Mark Farmer gives up the lead to pit, Phil Keen following him in. Slick tyres?
The #77 Lotus is also back in.
Slick covers on the #11 Aston.
Mike Simpson and, from the GT4 lead, Tim Eakin now pit as do about half a dozen other teams.
That number includes the Triple Eight BMW.
More cars in the pits, including Adrian Quaife-Hobbs and Daniel Lloyd for their team’s second pit stops.
Just before the end of the first hour. The safety is coming back in. David Ashburn, on worn wet tyres leads the race on a drying track.
Dennis Strandberg in the #61 Academy Aston has been shuffled back into the GT4 lead.
Back to green!!
Jon Minshaw is back in the pits. He’s still on wets, soo this will be a change to slicks surely.
Jonny Adam, still one wets, passes David Ashburn, still on wets, for the lead at Abbey.
Marco Attard is the best of the slick shod runners in eighth.
Jon Barnes is up to third, the Aston on slicks carving through the wet tyred runners.
Rory Butcher stops from third for slick tyres on the #6 Aston and Liam Griffin to get in the car.
Jon Barnes leads the race. Powering by Jonny Adam between Village and The Loop.
After an hour and 7 minutes David Ashburn pits the Trackspeed Porsche for the first time.
David Ashburn has missed his pit box. Stops in pitlane before being waved through.
Barnes leads Jonny Adam by 18 seconds. That’s the difference between slicks and wets.
Jon Minshaw is third, but he’s a minute off the lead.
Matt Nicholl-Jones leads GT4 in Academy Motorsport’s #62 Aston
Jonny Adam pits for slicks and for Andrew Howard to take over behind the wheel.
The Gt4 lead changes again. Matt Nicholl-Jones pits and Stefan Hodgetts leads in the Toyota GT86.
Contact between Aleksander Schjerpan and Luke Davenport. Davenport crabbing the #56 Tolman Motorsport car back to the pits.
Jake Giddings is second in GT4 in the JWB Motorsport Aston, Jake Hill 3rd in AmD’s Porsche
Lewis Plato, the RAM Racing Merc now on slicks is up to second, 74 seconds behind Jon Barnes.
22GT Racing – one stop made – lead RAM Racing – 2 stops made – by 77seconds. Barwell Motorsport – 3 stops made, but still on wets – are third, another 5 seconds back.
Oz Yusuf has spun the ISSY Racing Lotus. He loses time but carries on.
Andrew Howard, after the second Beechdean stop is back in 11th. Yo-Yo race so far for the 2013 champion.
Vannelet, takes fifth fro Lee Mowle at Maggotts.
Half way point, Barnes leads by 75 seconds from RAM Racing’s Lewis Plato. Jon Minshaw in third is another 20 seconds back, but….
Minshaw and the Barwell team have made the mandatory three stops, The RAM Mercedes has come in twice and Barnes and the 22GT Racing Aston have made just one stop.
The top three in GT4 are split by less than two seconds, Stefan Hodgetts leading the class.
Hodgetts now pits, passing the lead to Jake Giddings with Jake Hill right behind him.
Plato now pits the Merc from 2nd. Alistair MacKinnon taking over behind the wheel of the SLS.
Jake Hill has taken the GT4 lead in the AmD Racing Porsche.
Andrew Howard has spun the #007 at The Loop. He’s down in tenth with two stops made.
ISSY Racing – early race leaders in GT4 – are in the pits, Gavan Kershaw taking over the #77 Evora.
Jody Fannin is up to fifth at Lee Mowle’s expense.
Jamie Wall is limping the 4th placed #54 Lotus back to the pits.
There is an orange cone wedged under the front of the Lotus.
Ahmad Al Harthy takes second from Jon Minshaw. Jon Barnes still more than a minute up the road.
Lee Mowle pits the #888 BMW from sixth. This will put Joe Osborne into the car and complete the team’s third and final mandatory stop.
Jake Hill now pits from the GT4 lead, Graham Coombes standing by to take over the #49 machine.
Jake Giddings is back in the GT4 lead in the JWB BIRD Motorsport Aston.
Jon Minshaw spins, tapped around at Village by MacKinnon in the RAM Racing Merc.
Minshaw’s BMW had a flat rear-right tyre. He is smoking his way back down the Wellington Straight.
There is also damage to the front-left of the Merc.
The damage to the BMW is more than just a flat tyre. It’s suspension damage too.
Minshaw and Keen’s BMW is out of the race….
Jon Barnes pits the 22GT Aston from the lead. Mark Farmer standing by to take over the #11.
Marco Attard also in the pits, the #1 team giving up 4th place.
Ahmad Al Harthy pits the #2 car from second place. Daniel Lloyd set to take the Oman Racing Team entry to the end of the race.
The two Academy Motorsport Aston Martin GT4 both have stop go penalties for short pitstops.
All driver change stops have to meet a minimum time.
Jake Giddings pits from the GT4 lead. Keiran Grifffin standing by in the JWB garage.
Gilles Vannelet is fleetingly back in the lead, but pits the #12 McLaren.
The penalties for the #61 and #62 Academy Astons are 35 and 29 seconds respectively.
Alexander Sims is flying – just set the fastest lap now
Andrew Howard is up to third place now, as the #10 is in the pits
The #71 Aston that currently leads GT4 has a 3 second stop go penalty.
And the #71’s serving of it’s penance gives the lead back to the Toyota GT86, now with Richard Williams at the wheel.
Adrian Quaife-Hobbs takes third from Alistair MacKinnon at Brooklands. He’s 1 minute, 44 seconds off the lead which is back with 22GT and Mark Farmer.
Andrew Howrd, having risen up to second as others make pitstops, now comes into the pits himself.
And the #007’s stop gives Quaife-Hobbs second place, and he’s flying. 7 seconds quicker than Farmer on the last lap.
Alistair MacKinnon is black flagged, deemed responsible for the collision that put the Minshaw BMW out of the race.
The GT4 leader is off the track on the Hanger Straight. the Toyota GT86 is out of the race.
So the GT4 leader is now the Beechdean AMR car of Jamie Chadwick and Ross Gunn.
Gunn’s lead is 45 seconds over Mike Hart in the Quantamatic Aston, Liam Griffin 10 seconds further behind in third.
Adrian Quaife-Hobbs narrowly avoids a slow ISSY Racing Lotus on the exit of Club.
Gavan Kershaw in the Lotus looked like he was recovering from a spin.
The leader has had a big shunt out of Club
This will be a Safety Car – at least.
There are 37 minutes remaining.
Safety Car is out. We have not seen Mark Farmer get out of the car.
Adrian Quaife-Hobbs has inherited the lead in the #12 VonRyan McLaren he shares with Gilles Vannelet. Joe Osborne is 2nd in #888, Daniel Lloyd third in the #2 Aston Martin.
Ross Gunn leads GT4 for Beechdean AMR.
30 minutes left in the race. The field is behind the safety car as doctors and marshalls attend the scene of the accident at Club.
Reports that Farmer got out of the car and was standing up with the rescue crews. The car is being recovered onto a flat bed.
Quaife-Hobbs leads. Joe Osborne in 2nd has a GT4 car between he and the leader. Then there’s another GT4 between Osborne and third placed Daniel Lloyd.
Safety Car coming in, with 20 minutes of the race to go.
Back to green.
A ‘yellow flag incident’ involving Quaife-Hobbs and the #50 GT4 Ginetta will be investigated after the race.
Joe Osborne is just 1.2 seconds behind Quaife-Hobbs for the lead.
Osborne cuts the lead further to 0.7s with 15 minutes to go.
Jonny Adam, Rory Butcher and Andrew Watson are together in a fight for 5th place.
Alexander Sims and Daniel Lloyd are side by side around Stowe, but Sims’ outside line becomes the inside for the chicane and he takes third place.
Both Butcher and Adam have got past Watson’s McLaren.
Five minutes to go. 1.5s between Quaife-Hobbs and Osborne for the lead. Sims 5.7s back in third.
Adam is by Butcher for 5th. The front of Butcher’s #6 slightly damaged after contact somewhere.
Adrian Quaife-Hobbs goes onto the last lap of the race.
Quaife-Hobbs takes victory at Silverstone of VonRyan Racing!!!
Just 0.5 seconds between Quaife-Hobbs and Joe Osborne at the end of 74 laps.
Alexander Sims takes third in the #1 Ecurie Ecosse BMW.
Jamie Chadwick and Ross Gunn win GT4 in the Beechdean AMR Vantage GT4.
That’s it for our live blog coverage of the Silverstone 500. We’ll have a full report on the site as soon as possible.