The stewards have decided to exclude Lucas di Grassi from the Mexico City results, deeming his car to be underweight. That would elevate Jerome d’Ambrosio to race winner and Sebastien Buemi to second. Di Grassi would lose his championship lead. It’s also a haunting repeat of what happened in Berlin last year, where the ABT driver was disqualified after his car was found to have been modified.

Di Grassi’s car was found to weight in at 886.2kg. He was trying new wheels this weekend, presumably to save weight (although they could also be for better handling or thermal management of the brakes).

The stewards have also moved to remove Jerome d’Ambrosio’s fastest lap for cutting a chicane and have penalised Loic Duval by adding 15s to his finishing time for repeatedly not respecting track limits.

The news was revealed to the media at 2040 local time, although the di Grassi decision was issued at 2000 and the d’Ambrosio decision at 1921. Teams have an hour to appeal after the decision is issued.

We’ll bring you more when we have it.

As it stands, the revised race results would be as follows: