Romain Grosjean will start the Mexican Grand Prix from the pit lane after Haas changed the floor on the Frenchman's car overnight.
Having struggled throughout the weekend, Grosjean qualified last on the grid on Saturday, saying he was mystified by the poor handling of his car. Following investigations into the reasons for Grosjean's struggles, Haas has changed the floor on his car ahead of the race.
Parc Ferme regulations allow teams to replace items for an identical part without penalty if granted permission by the FIA technical delegate Jo Bauer. However, if the replacement part is of a different specification, then a driver is required to start from the pit lane.
The FIA has confirmed the replacement floor is not of the same specification as Grosjean used in qualifying, and as a result he will be forced to start from the pit lane rather than from last on the grid.
Jolyon Palmer has also been given permission to start the race from the back of the grid having not taken part in qualifying when Renault found a crack in his chassis. Palmer is allowed to start having set satisfactory times in practice.
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