Williams have revealed the cause of the accident that saw George Russell retire from the Russian Grand Prix, tracing the issue back to a problem with a wheel nut retainer.

Having crashed out of the Singapore Grand Prix after contact with Romain Grosjean, Russell retired from his second race in succession in Russia, appearing to lock up under braking and spearing into the barriers at Sochi’s Turn 8 on Lap 27. And while Russell was initially in the dark about the cause of the incident, a statement from the team’s Senior Race Engineer Dave Robson cleared the matter up.

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“We found an issue with the wheel nut retainer on George’s car, which led to the front-right wheel not sitting perfectly,” said Robson. “This caused a lock-up under braking. The design is very mature and well-proven. The remaining inventory will be inspected thoroughly, and we do not anticipate a repeat of the issue.”