I was on a track day (Renaultsport organised) at Cadwell in August 2009 and some bloke obliterated his six month old Glacier White 197 Cup. Rolled a fair few times, also heard that the car was on a pcp, so shouldn't have been on the track.
PCP does not mean you cant drive a car on a track. As long as its insured you can do what the hell you like with it. Renault will allow any car on one of their Renaultsport track days, PCP, straight finance etc.
My advice to anyone going to the 'Ring, is pretty much whats echoed above. TF is NOT a track day, and shouldnt be treated as such.
Drive within your limits like you would on any other public road.