F1 teams have been arriving and preparing for the Brazilian Grand Prix this weekened, and already, there will be a shake-up to the grid, as Max Verstappen will be forced to change engines, resulting in a five-place gird penalty. Along with this, Johnny Herbert has spoken since stewarding th Mexican Grand Prix which resulted in tow tn-second time penalties for Verstappen. As well as this, some changes have been made to the backroom staff at Toyota and Sauber.