Behind-the-scenes Red Bull footage emerges after Zak Brown called for FIA investigation

Sky Sports F1 cameras filmed engineers giving delegates a live demonstration of how their in-cockpit bib works amid a flurry of unwanted attention from other teams in the paddock at the .

The FIA released a statement confirming that a tweak had been made to the regulations outlawing one team's component. This team's identity was later revealed to be Red Bull, although they refuted any claims that the device had been used to illegally alter ride height under Parc Ferme conditions.

Following on from the news, Red Bull engineers demonstrated how the device works to FIA delegates in their garage after the conclusion of FP1. Sky Sports F1 reporter Ted Kravitz watched over the process and was convinced by the Milton Keynes-based team's explanations.

"The more I see about how this device works, the more I'm starting to truly believe Red Bull Racing when they say that we couldn't [use it]," he explained. "It would be evident on CCTV to get this device in there and start screwing a little nut that actually affects a bit of the car.

"So now I've seen how it actually works I'm starting to think there's no way they could have done this in Parc Fermé without a scrutineer picking up on it and saying, 'I'm going to refer this back to the FIA."

will be pleased to see the FIA taking direct action. In an interview with Sky Sports F1 ahead of FP1, he called for a "thorough investigation" to determine whether or not McLaren's title rivals had been using it in between qualifying and Grands Prix.

"So I'm very happy to see [that] the FIA is on it - I think it needs to be a very thorough investigation," the McLaren Racing CEO stated. "Because if you touch your car from a performance standpoint after Parc Ferme or in Parc Ferme, that is a black-and-white, material, substantial breach which should come with massive consequences.

"Touching your car after Parc Ferme is highly illegal within the rules, so I think the FIA needs to get to the bottom of were they [or] weren't they? Why would you design it to be inside the car when the nine other teams haven't?

"So maybe unfair of me to say... of course, I have an opinion on whether I think they have or haven't [used the component]. But you know, I think the FIA needs to be very diligent in their bottoming out whether they think they have or they haven't."