On Saturday 16th they're holding a public trackday, where you can just rock up in your everyday street car, or a dedicated racecar and have a blat round the track. Your car will need to be in a WOF'able condition, with a fire extinguisher securely mounted in an easy to reach place, you will also need a pair of cotton overalls and and a helmet
I've been hanging out for this since the last one back in April
Then on Sunday they're holding motorkhana, where you can just bring any car as long as its got four wheels and a steering wheel, no helmet or overalls required. For the Motorkhana what happens is they set up 3 short courses around cones for you to test out you driving skills, 2 of the courses are on the tarmac and one on the grass.
Heres a few videos of previous motorkhanas
Nissan Silvia
http://youtu.be/wZMaKJOFncM
Subaru Impreza Wagon
http://youtu.be/fs3eg6vSBXw
Honda Civic
http://youtu.be/aCyeW3oK7k8
Toyota Celica GT-Four
http://youtu.be/v-TKy3nMRn8