After looking forward to a track day at castle combe for the last few months the experience has sadly been cut short. After my first 15 minute session there was a loud noise coming from the front brakes which I put down to one of the heatshields coming loose. After letting the car cool down I took it for a gentle drive through the car park and suffered a complete brake failure resulting in me having to use a hedge to stop. The end result is a knackered charge cooler on top of the undiagnosed brake issue and a damaged front wing. I've ordered a hx cooler from the States so now just need to sort any bits for fitting. Anyone have any ideas on a cause for the brake failure? I've got rs4 calipers, braided lines, DS2500 pads and no loss of brake fluid?