The McLaren chief wants a penalty that would be a deterrent, such as an exclusion, should it come to light that Red Bull did break parc ferme rules. Zak Brown wants a signed affid

Zak Brown has requested that the Red Bull senior leadership and garage circles ‘sign an affidavit’ stating that they have never used the bib at the centre of the FIA investigation at the United States Grand Prix.

McLaren boss Zak Brown warned on Friday of "massive consequences" if champions Red Bull were found to have breached Formula One rules on adjusting car set-ups during closed 'parc ferme' conditions.

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