I went to Supercar Fest the Track Event last year, found the track boring and very unsuitable for supercars, particular with ceramics. The whole event was also a bit lack lustre, so swerved it this year, glad I did.
Gassed on Track was opposition, vastly better than expected, they really had something for everyone. Proper F1 cars on track, Nascar on track, Hyper/Super cars on track, track time for regular cars, there was a few crashed as per with any track day, but no one hurt. The event was superb though, easily one of the best events in UK full stop as so varied and catering for all but done so well.
A quick mash up video I made of event: