At the end of the day they're Tim's cars now. I can understand moving the Defi's over, because if the P1 is going to be the car for Spa then you want to keep an eye on things temp-wise.
But i'm not sure the Prodrive brakes will be up to the job for a track like that with a 380bhp classic. Get a set of 360mm ksports on it, call it an early chrimbo present if you've used up all your birthday gifts!