Two riders have been killed and six others injured in a catastrophic crash during the Quattro Group British Supersport Championship race at Oulton Park.
The incident occurred on Monday afternoon when 11 riders fell in a chain reaction at the first corner of the opening lap.
Owen Jenner, 21, and Shane Richardson, 29, both suffered fatal injuries in the crash.
Jenner was racing for Rapid Honda and died from a catastrophic head injury after being treated trackside and at the circuit medical centre.
A serious crash on turn one happened after 11 riders fell in a chain reaction
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Richardson, an Australian rider with the Astro-JJR Hippo Suzuki team, suffered severe chest injuries and died before arriving at Royal Stoke University Hospital.
Richardson had finished eighth in last year's championship standings with 146 points, while Jenner was in his second year of competition.
The crash took place at turn one, Old Hall corner, on the first lap of the race, with witnesses reporting one bike caught fire as emergency services responded.
The race was immediately stopped and trackside medical services deployed to the scene.
This had been the opening weekend of the 2025 British Superbikes season, which was scheduled to run for eight rounds across the UK.
Tom Tunstall, a 47-year-old rider for SRG Specialist Risk Group Ducati, sustained significant back and abdominal injuries in the crash.
He was initially treated on the track before being taken to the circuit medical centre.
Tunstall was later transferred to Royal Stoke University Hospital where he is receiving treatment for his serious injuries.
Five other riders were treated at the circuit medical centre with minor injuries. These were Carl Harris, Max Morgan, Cameron Hall, Freddie Barnes, and Morgan McLaren-Wood.
Cameras turned off after flames were seen engulfing the track
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Three further riders were involved in the incident but escaped uninjured: Lewis Jones, Corey Tinker, and George Edwards.
In total, 11 riders were caught up in the devastating chain reaction crash.
Due to the extreme severity of the incident and ongoing medical intervention, the remainder of the Bennetts British Superbike Championship event was cancelled.
Stuart Higgs, series director, described it as "a severe and catastrophic incident".
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Owen Jenner, 21, and Shane Richardson, 29, both died after a tragic crash on Monday
Motor Sport Vision Racing (MSVR), who operate the Oulton Park track, confirmed the decision to call off all remaining scheduled races, including Supersport Race 2 and BSB Race 3.
Cheshire Police have launched an investigation into the deaths on behalf of the coroner.
"Police are investigating two deaths on behalf of the coroner following a multiple collision at Oulton Park this afternoon," a force statement said.
The Motorcycle Circuit Racing Control Board and MSVR are investigating the full circumstances in conjunction with the Coroner and Cheshire Constabulary.
