Fernando Alonso's 100 per cent record in the World Endurance Championship came to an end at the Six Hours of Silverstone after his Toyota team was disqualified from the race. Alonso's #8 car - co-driven by Kazuki Nakajima and Sebastien Buemi had taken the chequered flag first in Sunday's race, but was stripped of the win after post-race scrutineering.
The Toyota cars finished four laps ahead of Rebellion's two cars, but the FIA reported they "were found to not comply with the technical regulations pertaining to the skid block under each car".
It handed victory to the #3 Rebellion R13-Gibson driven by Gustavo Menezes, Thomas Laurent and Mathias Beche, with the #1 sister car taking second and SMP Racing taking third place on the podium.
A stewards' bulletin read: "Although there are no reports of the car being involved in any specific incident, the competitor stated that his only explanation for the non-conformity must have been as a result of the car running off-track and sustaining some sort of damage to the internal stays that fix that portion of the car.
"The stewards considered this possibility but determined that the design of the car must be able to withstand the normal rigors of a 6 hours endurance race."
Toyota have launched an appeal against the decision, according to the FIA, and said in a statement reacting to their disqualification: "Both cars suffered damage to their respective front floor areas during the race due to impacts against the new kerbs at Silverstone. Regrettably, this also caused both cars to fail deflection tests in post-race scrutineering. As a result, race stewards disqualified both cars.
"The design and construction of the part concerned has not changed since its introduction at the beginning of the 2017 season. Since then it has successfully passed similar tests, most recently at Spa this season."