If TG wants to test the hypercars in earnest to the point when they have to stir up controversy, they might do it in the Disused Spanish Airport. They can find a runway that simulates the runway setup in Dunsfold and trick McLaren and Ferrari into thinking it's a different track, then Stig can hit the runway as if it's the TG TT, get the times, and say its the official one.

Or, they can go to the Ascari Race Resort, close it, then do the tests there.